I picked up a Mobius last week and have been having a blast playing around with it. These go for $80-$100 + mounting hardware and etc. It has way more flexibility than a gopro owner could ever dream of. With a weight of only 38 grams, you can strap it to your helmet without even noticing.
For $150 I scored the camera, a 32GB micro sd, several different length charging cables, and hardware for 6 different mounting strategies.
In terms of setup, there are too many settings to name. I have mine configured to automatically turn on and start recording when it is connected to external power. It records in 1080p 30fps at maximum bit rate until 10 seconds after it is disconnected from external power. I have the camera wired to my cigarette lighter so that when the ignition is on, the camera records. It records in 5 minute clips with a 1 second overlap. When the memory is full, it deletes the oldest clip. To enable write protection on a clip so it will not be deleted, all I have to do is hit the mode button on the camera while it is recording.
Color and white balance are adjustable and there are 3 profiles for lighting environments: Standard, wide dynamic range, and low light.
More info on this site: http://www.rcgroups.com/forums/showthread.php?t=1904559
I had fun checking out my footwork today.
The lighting was uncontrollable but the camera adjusted pretty quickly thanks to the "wide dynamic range"
These pictures aren't apples to apples but here they are anyway:
Gopro in rain:
Mobius in rain: