I use a 365mm long laptop and this stand copes with no issues. Stand does not vibrate with keystrokes, and it doesn't slip on table surface (at least on my timber table). Be careful however as you can set the stand up incorrectly - you will know if the laptop wants to slip off the stand at the bottom. If this happens just look at photos from Alogic website very carefully. If correctly installed, a laptop will not slip off stand even at highest install angle. PS Quality of packaging is amazing.