I'll start with the positive: the car is fun to drive. Now the negatives: There are several fatal design flaws that make ownership a real pain. For example, the six disk changers cartridge is at the back of the glove box and only accessible from the passenger seat (with all the glove box contents emptied). The center consoles is hard to access, provides limited space and lacks a power outlet or ipod connection. Unexplainably, there are two power outlets for the back seat passengers. idrive is useless. For a simply function, like shifting the air vent from the dash to the feet, it takes a dozen clicks. The 3 series is a classic and the 7 is luxury, but the 5 is downright useless.
Handling, cornering and blue tooth phone integration.
Redesign interior as suggested above, eliminate idrive.