I had my Indium Grey CS detailed just after getting it last year, had Gtech ceramic treatment and also full front end Llumar PPF, this was applied prior to Gtech but they used a different Gtech coating over the ppf so as not to affect its 'self healing' properties regarding scratches.
I'm really pleased I had it done, unless you got really close you wouldn't know its on and its not lifting at all anywhere. I do take a bit more care though when washing around edges like on mirror caps etc.