 The 335 coupe is the fastest car I've ever owned. I constantly find that I'm driving a lot faster than I should. It's quiet, handles like a slot car and accelerates like a V-8.  Mileage is almost the same as my 10 year old 3 series. The ride with the sport suspension is harsh over rough pavement.  Road noise is noticable over anything other than very smooth road. IDrive requires a learning curve. It's not intuitive, but once you get the hang of it, you have a lot of information and a lot more control over the functions of your car.  Although it handles well, it is a very heavy car for its size.  Brakes are a little touchy, but stop the car on a dime.  The windshield is raked back steeply.