A very nice shelf! It's surprisingly sturdy for a shelf that comprises of two pieces that don't actually attach. I have it on my mechanical standing desk and it barely moves at all when I'm moving the desk up and down. My only complaint is that two of the boards wouldn't "tighten" all the way and therefore wiggle when moved, but it's possible that I messed up the construction somehow and caused this. Overall it's just what I was looking for.