I have owned BMWs since 1977 (3, 5 & 7 series) as well as two Porsche 911s. The 645 is the absolute best, hands down - performance, drive, feel, style (interior and exterior). Recommend sport and premium pkgs. Sport drive is amazing. The 645 is the perfect balance of performance and comfort. The sound of the engine is awsome. And I-drive is very easy to understand.
1. Sport Drive. 2. style and removable cup holder (tastefully done by BMW finally). 3. Dash cluster (simple, sporty and exotic).
Seatbelts should be retracted to seat versus door column as it is a bit difficult to reach and causes some wear on door column.