I have the screen-only protector installed and have not noticed any difference in screen responsiveness - but then again I hadn't noticed in the n800 or n810 when I had them. The rubbery texture comment is spot on - it certainly grips much better than the screen alone.

Otherwise not much to say. It does an incredible job, lasts longer than any device I've put it on, doesn't affect clarity or viewing range that I've noticed. I will say that you'll want to clear your evening to get it on. Get a room nice and steamy to get the dust out of the air, take your time, and don't be afraid to redo it until it's perfect. Once it sets after a couple of hours, it's MUCH more difficult to remove.

edit: I'm not sure the full body protection is the way to go...it will certainly do the job of protecting the whole thing against scratches, but it offers no shock protection. I had one on the n810 and the corner edges started to pull away after a while. I just trimmed them with the scissors on my pocket knife, but after a while I started to wonder why I bothered.