Eh, it's ok. I've played with it on the G8 about 7 years ago. I did the front grilles and a couple of other things. It turns out nice, but over time it will get messed up or start to come off. It was more of a pain than anything because you had to keep taking it off and re-spraying.
I think it is good to get an idea of how your car will look with it done, and if you don't like it, remove it. If you do, maybe consider getting it painted, or some carbon fiber pieces (if maverick man still makes them for our cars).
Current: 2009.5 SBM G8 GT, Premium Package, Sunroof, Pat G. ECM/TCM Tune, Roto-Fab 102mm CAI, LS7/LS3 MAF, Kooks 1 7/8" LT's, SOLO HFC's, SOLO Mach-Shorty Balanced Catback, SOLO 3.5" Tips, 19" Sport Package Wheels, GXP Steering Wheel, GXP Diffuser, Neondials, VG Sharkfin II, Debadged (Except Arrowheads), Hood-Vent Mod, Lower Grille Mod
Next: RCR Modified Intake Manifold, RCR Ported TB, Powerbond UDP, Suspension Upgrades