I wish that rear spoiler was maybe half the height, more than stock but not this high. IMO it's too tall. I don't care what BMW says about the aerodynamics as the stick Gurney flap already has a proven benefit. If I wanted a poke in my eye and the downforce to go with it then I'd get a wing.
What about a rear diffuser? That would clean up the rear very nicely. I like the new IND/Challenge diffuser.
Just my opinion.
2010 BMW M3 Coupe M-DCT w/Tech-EDC, BMW M Performance Exhaust, BPM: Stage I / Euro MDM / DCT / Steering, Space Gray / Fox Red Extended, and a Trunk Monkey known as "Der Stig", plus the daily driver...
2011 BMW 135i M Sport DCT, w/BMW Performance Power Kit, Exhaust, and Brake Rotors, Space Gray / Coral Red, known as "Stiggie" with an outlaw F20 "M135i" badge.