I had purchased one.
The first one i received was damaged and did not fit properly. I contacted nushield and they promptly shipped me a free one that fit a lot better. About two weeks later, though, i decided that i didn't like the extra glare that the nushield had made. Anytime i wasn't in a pitch black room, it seemed as though i was looking into a mirror instead of my laptop.
I tried different viewing angles to prevent this, but it seemed that any kind of light source from around the laptop just makes the screen almost to a point of being uncomfortable to view. My eyes had a bit of difficulty paying attention to the actions on the lcd rather than the actions that were taking place in the reflections of the nushield.
All in all, its an ok product that does it job. However, i cannot justify that the added screen protection is worth all the extra glare that you have to put up with when you install the nushield. The only viewing angle that i found which really helped emliminate the extra glare was having the screen about 30 degrees up from the keyboard, but that's absurd.