I've ordered 27 times so far (thousands euros) and can't tell any bad words about them.
Great services, great support, great portfolio, all packages was delivered ASAP (to Slovakia). It is the best store for musicians i know.

My guitar (entry level, cheap guitar as thomann insist in remember me), came with the package taped like if a 3 year old child do, not with staples, lots of dust, like an an exhibition device.
My amp (marshall) came with cable like a nest.
Now, after a lot of emails where they say that it is normal, that the manufacturer do that because it is a cheap guitar, I contact the manufacturer, and they said, quote: "I can assure you that this is not how this guitar was packed at the factory".
As I send the manufacturer email to them, they do not answer me any more.
I let go the amp thing.

I have bought so far, 1 guitar, 2 ukuleles, 2 pickups. From these, 1 pickup was not working, 1 ukulele was scratched and the guitar stopped working after a few months. They decided to recall the guitar which was then broken during transportation back to Germany. After appealing from their initial decision to sending the guitar as is (broken) back to me, I was able to obtain a satisfactory solution from Customer Support. The ukulele and pickup were so low value that they just decided to send me another one (still in transit).
So, not the best percentage so far, but I guess is good to know Customer Support was there in the end for me, even if I had to appeal from their initial decision in one of the issues. I hope to have better luck with their products next time.

They sold me a guitar that was 2 years old from build date. The neck started to crack top joint they more or less called me a liar. They said it must have been involved in a accident. L know it has not. It has never left the same room since the day it came out of the box. If it had been mistreated it would have impact Mark's on the guitar but not a mark on it. The 3 year warranty is none existant. Go elsewhere.

The worst and creepiest company ever

I returned an item, but haven't got the refund, I think they're gonna steal money, they are thief.
I followed their return instruction, this company will steal your money by sending defective items, don't buy there! I guess good reviews are cheat by Thomann

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Revision
Finally I got the refund, this took so long

I've spent most of my disposable income at Thomann for many years, so I think I can safely say Thomann rocks!

I can personally verify that:

1. They have a truly incredible amount of stuff to choose from! Not only all the usual brand names, but they also have good quality in-house brands with unbeatable prices (Harley Benton, Zultan).

2. If you still need something they don't have, just give them a call and they'll contact the manufacturer and get it for you. A very useful service, considering the fact manufacturers won't normally talk to YOU, but they'll return Thomann's calls alright! This has saved me on occasions.

3. When you have no idea what product best suits your needs, call Thomann and discuss it with their very helpful staff, they'll answer any questions about the products and guide you to the right choice. Thomann hires people who love music (and who often play an instrument themselves), and it shows in their enthusiasm!

4. They deliver quickly, and you're guaranteed to get flawless products, unless you specifically order items marked B-stock to save a buck.

5. If there's something wrong with a product anyway (perhaps it was damaged in transit), Thomann will replace it at no cost to you, and if it takes a long time to get a replacement they'll offer a rebate instead, if you prefer it.

6. If there's nothing wrong with a product but you find you don't want it after all, just send it back within 30 days, and Thomann will refund you in full, no questions asked. They will even pay for the return package! This service is so awesome I feel embarrassed every time I use it, it feels like taking advantage of a friend who is just too nice for his own good!

7. Cymbals are a great example of when Thomann's customer friendly way of doing business absolutely rocks. Cymbals are difficult to buy, because ever individual cymbal is unique, and you'll never know if you'll get one that melds well with your other cymbals. With Thomann you can order a few of the same model and see which one works best for you and return the rest. I wouldn't DARE to buy cymbals online from anyone else!

To sum it up, I've spent tens of thousands of Euros at Thomann over many years. I've bought guitars and basses and drums and woodwinds and microphones and studio equipment, and I've never once been disappointed with Thomann's service.

I have however often been impressed with their professional and user friendly business practices, and the helpfulness of their staff. To me, Thomann represents the measuring rod for how an online business should be run! Did I mention their online "in stock" status never lies? Little things like that is what makes an online store pleasant to use.

I write all of this because I'm APPALLED to see the low ranking Thomann has here! I can't think of a business that deserves this kind of harsh complaints less. Everyone should realize that Thomann is a huge business with lots and lots of customers. Apparently a few of them are unhappy for whatever reason, and feel the need to vent their disappointments online. But if my experience is anything to go by, your odds of being a happy customer are great indeed!

PS
The product reviews made by users at Thomann are often the only product feedback by users available anywhere on the internet. Always read them! If there's a subtle problem with a product, there's a good chance someone has encountered it before and can warn you, or tell you how to work around it.

Best customer service in the whole World, Great range of producs! 00% feedback from me everytime. I have never had a problem with anything and i have bought a lot and will continue doing so.

YOU HAVE 30 DAYS TO RETURN AND MONEY BACK GUARANTEED, AND THEY ARE VERY QUICK IN RESPONSE, AND YOU DON T EVEN HAVE TO PAY A PENNY FOR RETURNING PRODUCT, I ORDERED AT LEAST OVER 200 INSTRUMENTS IN THE PAST 25 YEARS AND IT IS DEFINITIVELY THE BEST SHOP FOR MUSICIAN WITH THE BEST CUSTOMER SERVICE EVER! EVERY VERY FEW TIME IT WAS A PROBLEME. THEY SOLVE IT EVERY TIME FASTER THAN THE SPEED LIGHT! ANY EMAIL GOT QUICKLY REPLIED, AND WHEN THERE IS A PROBLEME THEY ALWAYS FIND A QUICK SOLUTION.(ALWAYS!)i CAN NEVER RECOMMAND YOU THIS SHOP ENOUGH! IT SIMPLY THE BEST MUSIC INSTRUMENTS RETAILER IN EUROPE WITH THE CHEAPEST RATE AND ONE OF THE MOST EFFICIENT CUSTOMER SERVICE! SHIPMENT IS USUALLY VERY QUICK WITH UPS AND THE STOCK SHOWN ON WEB PAGE IS ALWAYS REAL! GO FOR IT NO HESITATION NECESSARY!

I would have liked to buy an Hofner Cavern Bass but the delivery date was always postponed so I have had to change my order. The some thing happened with a Cabinet Markbass. The payment had been taken from my credit card before Thomann had sent the items. I'm waiting for the refund for two weeks.

I ordered a bag for my Denon Prime 4 and was sent the wrong bag in error. It is too small for the screen to fit.
When I called to try and sort out the situation, the lady handling the transaction was very rude, suggesting that I had ordered the wrong bag before she even checked the file. She then told me it would be three weeks to return the bag I just received and would call me back. I am still waiting!

I saw an item I liked at a competitive price, I contacted their BRASS customer service to inquire about the product and overseas warranty before placing the order for a Selmer Reference 54 Alto Sax (very expensive horn) - I NEVER RECEIVED A REPLY. No problem, I purchased the saxophone somewhere else. So why am I writing a negative review then? Because, if they do not even have the courtesy and professionalism to respond to a simple message, then, much less would they respond to a more serious matter (i. E. an overseas return from the USA) as so many others have mentioned. If you want to do business in the USA, at least kindly tell the brass section to have the courtesy to respond to potential customers. CJ (ps: Do NOT censure this post please, as I am taking a picture of it and posting in all social media to prove submission).

I do not use Thomann as much as I should, but whenever I do, this is the experience:

I find exactly the product I need, even when I have looked elsewhere online.
I get really good prices.
I know delivery will be fast.
Responsiveness and shipping of my order will be extremely quick.
Customer service is excellent.

I really must remind myself to shop with Thomann more frequently. Very highly recommended.

5 Stars all the way!
Incredible choice of instruments and everything else associated with making music at unbeatable prices. Fast reliable delivery service and everything arrives well protected and packaged. I have used Thomann many many times in the past and will continue to order all my guitar and amplifier parts through them in the future.

Took less than a week to get my guitar all the way from Germany to the UK. Picked up a Harley Benton guitar and wow. I have no idea how they can sell such a great quality instrument at such a low price. Unbelievable.

I have been using this store for as long as I can remember. From when I got my first bass at the age of 14 right up to this guitar pick and replacement acoustic peg purchase at the age of 29. I have recommended Thomann to many friends and family and everyone has come back more than happy with their purchases. If I could give more than 5 stars I would.