Fits perfectly into my CP4 stage (which should be the case anyway) and is very easy to install and remove. At first I thought I didn't install it correctly and felt it would be a bit flimsy. But its weight holds it in place no problem. I'm using a very stable keyboard stand (K&M 18810) and since it doesn't vibrate (at all), the CP4 stand also doesn't shake. Not sure if that would be the case if I was using a different keyboard stand though.
4 stars because it is expensive for what it is. However, it can hold more pages than a regular Music sheet stand and I'm really happy with the purchase.