I purchased mine from Lowes. I was not impressed with it from the start. The boards that make up the top are never level with each other. They are made of some kind of Chinese bamboo plywood and two of them sag in the middle. As for clamping...  terrible. It wouldn't hold anything still. The metal frame is made fairly well but I found that mine was twisted and parts were not connected properly. After some tinkering I got most of the kinks out except the sagging top. Still, I wish I had returned it based on my first impression. All you are likely to use this for is a work table and it is a bad one at that.  I would not recommend this product to anyone.