My personal opinion on body kits is that they are a pain in the butt!! They do not fit 100% especially if they are urethane and the double sided tape they supply is not always the best way to mount the kits to your car. Anyhow, I decided to mix a few parts form different kits to make my 06 GT different from other stangs that the owners choose to stick with 1 kit.
here is my current mods
BMR subframe connectors, upper strut stress bar, bmr adjustable panhard bar, kw suspension coilover kit variance 2 with adjustable shocks and lowered almost 3 inches, bassani cat back with xpipe and hi flow cats, xenon 6000K headlights bulbs H13(9008)--wired by myself and saved a lot of money compared to the saleen kit
.. 20 x 10, 20 x 9 inch wheels with bfg KDWs.
Body kit is street scene gen 1, with 3d carbon side window louvers and rear blackout with a roush rear spoiler. Stripes were custom painted and the whole car is re-cleared with much better clear than the factory.