I use multiple laptops for work as I can transport them from office to office easily, but hate typing on the small, cramped keyboards. This stand is very nice as it holds any size laptop very securely, is adjustable to any degree of tilt all the way to full vertical, and comes apart for slipping into a laptop bag and taking with you.
The vertical placement that this can do is great, hard to find in any other one. No way these will slip out either, very secure design.
To use this effectively though you will not be able to type on the notebook keyboard while it is in the stand, you want want a mini USB keyboard to plug into and place in front, or a wireless keyboard/mouse combo. So much nicer though to give it some air and raise the screen to eye level.
Took off one star because it is flat along the bottom and blocks access to the buttons on the front of my Dell XPS 1210 for things like mute and volume control, there is a Kensington stand I also have from the Dell site that has a curved front to allow access to those buttons, but it does not go vertical like this one, so have to choose what is best for you.
Overall, very good, highly recommend for getting your desk space back.