Don't want to crash your thread Ian, but I wanted to echo your sentiments..
I took my MY06 Azure Z to Paintshield, Grantham on Monday (26/6), where Tom's team did a really superb full front-end installation (inc full wings).
From just a few feet away it is virtually invisible, close-up all you see is the sparkle and lustre of the existing paint and a very feint line neatly following the panel edges. I've attached three largish, hi-res, close-up pics as it really isn't worth shooting from much further away!
Totally chuffed with the Paintshield service and the end result.
If the 3M film's performance is effective and durable, then IMO this stuff is a must have!
cheers, Carl.