Torque out the kazoo, lots of grunt for passing, throw it in to corners as hard as you want. I regularly drove the car on 600-mi trips and was very comfortable at the end. However, exceptionally expensive maintenance has been a downer. I spent over $3500 (incl $650 to replace a window motor) in 8 mos and could be spending another $1500 as the car has >100K mi. Will not buy another BMW w/o warranty (and probably not with warranty until iDrive tumor is removed).
Handling, cornering abilities, acceleration, the BMW "look".
Labor rates and parts costs are horrible, and few non-OEM/non-dealer choices available. Longevity/affordability beyond 100K is questionable. Usual knocks about BMW "cupholders". Make interior door handle pulls of metal instead of plastic (broke two).