The retractable mirrors is definitely needed for cities with narrow streets. The X5 mirrors seem to stick out more than most other vehicles and can really be damaged by passing cars.

The camera works great in the day time and looks like abstract art done by a child at night. Still, given the limited visibility from the back, I would recommend having it. the technology package also comes with the sensors in the US so even at night, the combination of the bad camera and sensors should be more than adequate.

Good luck.