This was easy to put together but it is wobbly and doesn't seem to be very sturdy.  The knob that is used to raise and lower the tray is made of plastic and mine had a crack in it.  I don't see this lasting for very long.  I do, however like the vented top to help keep my laptop cool, and I use the cupholder to store my mouse and extra flash drives.  I also like that the tray swivels.