I am a user of gearbest for several months already and they provide really great service with quite low prices. Added to that, there are special offers, coupons and sales almost always plus at the checkout you can decrease the price by more 30% using special GB points which you earn on the website and that great! And there's a free shipping on almost every item. Top chinese brand items are sold at very low prices.
There are variety of payment methods like paypal, credit cards of event GB credits.
The customer service is excellent, the responses are fast and helpful, provide all the necessary information and really provide help until the problem is fully resolved.