I was mis-led by the video which shows a gentleman moving the monitor arms up and down easily (without using a hex key). After my stand was installed by our Maintenance department I discovered that you must use a hex key to be able to adjust the monitor height on the pole. I re-watched the video and saw that the monitors were not installed on the arms when the gentleman was moving them easily up and down. Well of course it was easy to move the arms up and down without the monitors connected! This is a very sturdy stand and the monitors do tilt easily without using a hex key. My stand is mounted through my desk. I love the extra room this gives me. The weighted base is super heavy so I assume the stand is just as sturdy using the base rather than installing through a desk. If you don't care that you must use a hex key to adjust the height of the monitors then I would give this a 5 star. We are ordering several of these for our office.