I love mine from Joann's. It sits on a rug so it doesn't wobble or move around. I have leaned on it, but then I have to move it because it sinks into the rug and isn't quite level. The difference in the leveling is not enough to hinder my cutting. I also bought the cutting mat that fits on the top of it and it is great, the whole surface can be used for cutting. I also bought the ironing cover so I can easily iron finished quilt tops without having to keep moving them across the ironing board or dragging on the floor.
The thing I love most is that it folds away which is necessary because I cannot have a dedicated sewing room.