i just got it, so easy to installed, no bubbles at all and it was dry in 5 minutes. it was kind of expensive but it really is worth it with the life time warranty if it ever gets scratch or damage.
i tried the scratching test with my house key and zero scratch.
www.shieldzone.com
to see pictures
http://www.shieldzone.com/small_gallery/
to watch a video example how strong is it
http://www.shieldzone.com/movie/index.html
review on one of the shield installed in a iphone
http://www.youtube.com/watch?v=MmpFOUZoUX0