I bought the "Ultra Slim Manual Height Adjustable Sit-Stand Standing Desk Converter Tabletop Desktop Workstation Black." I already have a large standing desk which is also very heavy and wanted something smaller that could easily be moved and not be too heavy for my wooden table surface. I'd been looking at different kinds of standing desks and many were not good enough. Some were stable when at the lowest setting but when raised to maximum height, they became top-heavy and could easily tip over with my laptop! The Ultra Slim one is very sturdy. At maximum height, it is very comfortable when I stand (I'm 6 foot 1 inch). the mechanism performs solidly. I think this is a great product and It also has enough space for my 17.3-inch MSI gaming laptop plus room for a mouse pad and mouse plus 2 heat extractors for the rear vents of my laptop. It was a great price and was delivered very quickly. The only oddity is that when the table that the Ultra Slim is sitting on is banged, the springs underneath the Ultra Slim resonate for a bit. Overall, it's a great product.