I discovered GearBest about 9 months ago and since then I have placed at least 30 orders and this is my personal experience so far: Fast shipping (10-12 days on average) and well packaged, if they say a product is original, then it is (I haven't had an authenticity check fail on me once).
I love their wide selection of products at very good prices. When you have a question the customer service is quick to respond. I honestly cannot think of any issues with GearBest, it is by far my favorite webshop and I have no problem recommending it to my friends and other people.