Before I got these I had another desktop mount that allowed me to move the screens up and down. I chose them because I wanted something that would keep things steady, have good height and support the weight. A nice bonus was the ability to place your laptop on it. So if you are looking for such a desktop mount, then this is it. But if you want something that lets you change height, this won't work for you. I wish they had an extension for the top bracket. Due to its extremely short arm, it's difficult to get my top monitor where I want it to be. Otherwise totally happy.