i am using zagg for 4-5 month, with very bad results :S
on the back the corners are all loose, those litle pices on side are all gone, and the front is loosing its glue? dont know what it is, just from time to time i clean n900 and the front left corner is full of some sticky thing, speciali around cam hole! i have n900 in the orginal nokia leader case most of the time!

mybe i didnt applay shield properly, but i watch manual a few times before i try it.

Kristijan