It completely changed my ergonomics. Having multiple monitors was getting to be a pain turning my head, but keeping my shoulders in the same place. I needed something that would keep me from having to type over my shoulder, this worked perfectly, I can rotate my chair to face the monitor i need. I went from 3 to 7 wrapped around my office. It isnt a very robust tray and the plastic is fragile feeling, but its not bouncy for me. The keyboard portion fits a Kinesis Advantage2 with little room to spare. Instead of the arm rest thing I 3d printed an extension for the kb tray to hold my trackball.