Like the front bumper w/splitters, don't see the "rear diffuser bumper".
The roof spoiler looks like a tacky add-on that makes the upper part of the car look way too heavy, the AC-S wheels are "way-busy" and take attention away from the car's natural lines.
Do like the "siamiesed" exhaust tips.
Of course the (5) AC Schnitzer logos are ridiculous and turn the demo model into a rolling billboard. The word "subtle" is obviously not in AC -S's vocabulary!
Can’t imagine being that desperate for attention to install the whole package, but to “each his own”. It would help make the X3 feel at home with the local “tarted-up” Civics, Lancers, and STI’s.