I sit at the computer all day every day, and I'm not a very tall person, so I really needed an adjustable tray. This one adjusts in every way I need it to, and it works great with the Microsoft Natural keyboard. My only problem with it is the fold out mouse pad. The mouse pad is significantly lower than the keyboard tray and for me, that's a little bit awkward. Also, mine is looser than I would like. Whenever it gets bumped at all, it moves around, and often the mouse ends up falling off. I think if the mouse pad were as adjustable as the keyboard tray, it would be perfect. Overall though, I'm happy with this purchase and it has made sitting at the computer all day an easier and more comfortable experience.