Ok, just an update from my 6am rant about installing my Zagg invisible shield to me '4'!
Had it on all day, and you know what, it good! I didnt bother putting the side 'shields' on, as I have a bumper, BUT I put on the front and back. You will never get this on PERFECTLY. Another thing, the front shield is FAR FROM invisible! It has an orange peel effect (same on my mates iphone 4). It is very secure, and protects the phone 100%, BUT, I don't like the way it looks, and TBH, I might jus leave the back on and take off the front. Whats the point of having a damn retina display if I can't enjoy it!?!?!?
Hmmmmm, still, front+ back invisible shield and apple bumper = fully protected!