The best thing about this desk is that it fits on a work space that is not very deep. Our front desk has a walk-up counter on the front that reduces the depth of the work space to just under 18" This unit fit perfectly on the desk and, with the keyboard extension, actually expanded the available space. It adjusts easily and is really very stable. It's not sturdy enough to be leaned on (like during a little chit chat), but as a work platform, it performs very well. The really great thing is that it goes straight up and down, no rising in an arc. It is not just 2 levels as indicated in the headline description. IT can be locked in multiple levels.The only thing that is really a nuisance is the large slot in the upper work surface. It pretty much negates being able to use this area for any kind of writing unless you have something substantial under you paper and don't mind writing over the hump created by the grommet. I wish you could buy it without the slot, but I wouldn't hesitate to buy another!It's priced right and was easy to assemble. 98% a winner!