The car handles incredibly well as a BMW should. It's quiet, fast, comfortable and fun. But if you are cold or hot...don't expect iDrive to help you out. It takes several minutes to get through the menus. Stupid. If you have an ipod...you better not have a lot of music on it...unlike the ipod scrolling function it takes FOREVER to get through the list. If you want to use the navigation to plot your route...don't use this system. It chokes on the simplest request. In short iDrive, if I had known how truly bad it was before I bought the car would likely have made me buy an Infiniti (and add Dynamat soundproofing). Better value. More intelligently designed user information and climate controls.
The smooth shifting transmission and handling.
iDrive really needs to be tested by people in the real world. It's not an easy to use system. It's simply not elegantly done.