I leased a 530, when the 335 felt surprisingly small. The ride of the car is great, and the quality of materials used in the cabin are great. I really wanted the hi-fi audio, but could not find a car with it. I can see why, as the "stock" system is great, far exceeding my expectations. the 3.0L engine is very capable, and handles all speeds very well.
Overall ride is smooth, satellite radio is nice, sound system is great, comfort access is nice.
Car should lock automatically after egress with comfort access. Nav screen could be bigger (full screen option), multi cd should be standard. While iDrive is not quite as bad as I expected it could be easier (touchscreen maybe?).