I have not personally used them, but am seriously consdiering some bulk purchases.
They have two reviews here at Salehoo, both 5 stars, hard to do much better than that I would imagine. Just make sure to take your postage into consideration with the price as I seriously doubt if that free postage offer is for international purchases. Even that taken into consideration, I think it would be hard to find a better supplier at those prices, even liquidatiuon suppliers are no cheaper!