PROS: It's large enough to fit my 17" laptop with room to spare. No more keeping my knees together as though I'm wearing a skirt. CONS: After 2-3 weeks of moderate use one of the rails is already starting to come off. The cushion is attached by velcro to the rails that allow the mouse tray to extend/retract, but these rails are only glued on. The mouse tray is too small to function as intended unless you use a very small mouse with high sensitivity settings. It does NOT keep my lap cool for long, but I can't really expect it to without an internal cooling system. It does allow my laptop to cool itself more effectively, so It's better than sitting on my lap.