My impressions:
The connection via Bluetooth to your smartphone (in my Android) works much better than the +. Updating the camera is now really easy. An infected PC and update via Storyteller. The lens is no longer rattle !!! And if you're a Bluetooothverbindung, you can start recording via smartphone and the connection remains active. It's also nice the laser to align the camera, known from the GPS version of Contour. Who does not need, it can turn off the setting. A lock key for accidental operation of the recording is also available. It's also nice the thread in the housing, since it takes no more this stupid adapter for the suction cup
Note that you should the battery compartment of +2 is somewhat narrower than in the +. A cheap alternative to the Contour batteries is the Nokia Battery BL 5C. Here at Amazon there are used for approx. 1 Just fine.