I am so glad I bought this standing desk converter.  It has a small footprint, and fits on top of a small desk that I purchased as I now work from home (due to the shelter-in-place order in California).  It's very easy to adjust the height and I shift it from standing/sitting every work day - something that my back is thankful for.  

The only reason I didn't give it 5 stars was that the keyboard tray doesn't sit quite low enough or stick out far enough.  I solved the "not low enough" issue by further elevating my monitor; but there is only how much I can pull the keyboard toward me (before it falls off).  If the keyboard tray sits a little lower and angles out a little more, it would be perfect.