I purchased this stand to raise by retina macbook pro to same height as my thunderbolt display on my Nextdesk Terra adjustable height desk. When typing on external keyboard either on desk or on keyboard tray, this stand vibrates excessively such that text is very jittery. I have returned this stand and will try one of the other recommendations.
The computer screen bounced every time that lightly typed on the keyboard of my 17 inch MacBook Pro. I actually felt motion sick after awhile with the movement of the screen. Perhaps this works better with a smaller laptop, but I am definitely not keeping this stand.