This may be a bit lengthy but its worth reading.
I bought this machine and had problems right our of the box. The machine is a massive piece of metal yet there are two poorly designed plastic retainer clips that hold the shuttle assembly in place. Mine broke in the first couple stitches and wham major problems. I should have returned the machine then but I let them talk me into keeping it. They sent me two new clips (also plastic) I replaced them then went through the instructions on insuring no burrs were on the shuttle etc. I was able to use the machine with limited success on a couple of sewing projects. But have had chronic problems with thread feeding and material feeding. I was rather patient and kept trying to make this machine work. Eventually the warranty expired as I like everyone else has to work etc and life goes by quickly. I got the machine out to sew some canvass and wham another major malfunction.
Out of frustration I gave the machine a very negative review on this site. I was contacted within two days by Salirite. They agreed to repair my machine under warranty if I shipped it to them. I shipped the machine to them at a cost of $100.00. They returned the machine promptly with a sample of beautiful stitching. I anxiously tried the machine on a small piece of canvass. It seemed to work. I changed my review to 3 stars commending their customer service and left it with "time will tell"
Well here we are. About one week later, I started to sew the same material and same thread. No changes to any settings. I got about two inches of stitch and was met with a loud WHACK and a ball of birds nest under the machine around the bobbin. I will again commend Matt B. In their service Dept as he offered to help me via internet and with pictures etc. He appears to be a knowledgeable and genuine person.
By this point I simply want to be rid of this machine. I was advised since the machine is well out of its 30 day return window, returning it is not an option. I will not pay another $100 to ship the machine back and I do not have the time to play patty cake over the phone in a vane effort to fix something that I have already wasted too much time and money on.
So here is my honest review of the machine. To me the machine has no value. It is unreliable. I can't return it, and I can't sell it to someone else in good conscience. I will write it off as an expensive lesson learned. I should have sent it back immediately when it did not work correctly. I have another smaller machine of a different brand which has always just worked. It has worked every time with every material and every thread that my LSZ-1 has failed with. I have never had to make any timing changes or anything other than appropriate needle, thread, tension etc. But it has always worked where the LSZ-1 has failed. When I bought the LSZ-1 it seemed like a good value it was one of the least expensive machines of its class. Turns out I didn't save any money by purchasing this machine. Instead I have now wasted the purchase price, the cost of shipping for warranty work, lots of time and lots of wasted material and thread. Now I am choosing to quit while I am behind and not loose any more time or money with this machine. I am not certain what I will do with the machine. I have several options. Book end, paper weight, exercise prop, scrap metal, boat anchor etc. It will likely remain on my shelf as a reminder of the series of poor decisions I have made up to this point.
I gave the LSZ-1 one star for two reasons, 1. Matt B. Tried to help, for that I commend him. 2. The site won't allow you to give zero stars. Otherwise It would have gotten zero stars from me. There are many people who wrote great reviews on this product. Good for them, I'm truly glad they had good experiences with their machines. I did not.