Techskin (Wet application) is great for the back. Again, a must if you use the tablet outside of a "proper" case, to prevent the metal from getting scratched.
The front.....definitely reduces clarity some. You may get some micro-bubbles or other artifacts while installing, but the warranty will allow you to get a replacement if you screw it up (I did the first time, ended up with a couple blotches of micro-bubbles).
The protector definitely provides some more resistance while sliding the finger, not quite as smooth as without.
I plan to use it for a while, but maybe 6-12 months down the road i'll remove it when it gets a little worn and go "au natural". A back cover and a neoprene sleeve for transport is all i need.
Really nice sleeve, it could use a bit of velcro to keep the fold from crinkling up. Nice front pocket for carrying the charger, or wires.