Ive used one of these for several months now and it has remained stable and sturdy. However it has a habit of tilting the monitor a bit downward and my monitor is well within the recomended weight. I can push it up but over time it tends to slouch again. Aside from that the mounting mechanism on the bottom doesnt clamp enough to work on any of the two desks i owned natively so i had to get something and put it inbetween the clamp and my desk to work.