Walter  
2007 BMW M5 Sedan 4dr Sedan (5.0L 10cyl 7AM)
Fun but expensive to own
 Owned this car for almost a year now. It is my fifth BMW and first M car. Other BMWs had no reliability problems and fairly good performance. This car is all performance and no reliability. First 2000 miles in the break-in period, it consumed a quart of engine oil every 100 miles. It seemed like it ran on engine oil and not gasoline. I had problems with transmission (SMG), tire allignment, and driver's window. But I don't know if any other car can match this car's performance, practicality and fun to drive. It is stealthy enough to not attract too much attention, and yet it is powerful enough to street race a Porsche non turbo. Love this car, will buy again when the new model comes out.