Swing arm not easily adjustable for tension. Once adhesive tape fails (as it WILL), almost impossible to get holder to re-adhere... but then, short of using epoxy or screws I don't think any document holder will stay put.
There is a piece of tape that comes with the product to adhere it to the monitor. The tape did not hold up and fell, knocking over my coffee and ruining my paperwork. The monitor can't be tilted back otherwise the holder will swing back as well.
This item easily attaches to the side of a flat panel monitor. However, there is no way to lock the arm into place. If you have your monitor tilted back, the document holder swings back; there is no way to keep it in a certain position for use. I had 3M replace the one I received, and the 2nd one had the same problem. I have to put a full bottle of water behind it to use it.