I have also placed an order with GearBest.com for first time last week. GearBest seems to be a new to me website, having warehouses in various regions around the world, including China (or Hong Kong not sure), EU, US etc.
Their prices are very good, if you compare them with US or EU seller on Amazon/eBay etc. They offer shipping on Aramex to Saudi Arabia in very reasonable charges, so that is a plus point.
So far, I have noticed that they are not as quick as Amazon in shipping out items. But I cannot complain too much, until I complete the overall experience. Lets see how my overall experience goes.