Well I _had_one. Victim of a tragic tri-copter loss this weekend.
I intend to replace it. The video quality is exceptional, user interface (buttons) are trivial to master) and the mounting system allows you to lock down the "carriage" and still be able to securely slide the camera in and out of mount. Low light sensitivity is good enough I was able to film a fire spinning event quite nicely.
I've been using my Mobius ActionCam for a couple of months now. It's a great little camera for the price. It's a definite improvement over the 808 keychain cameras. Here's some FPV footage I captured with the Mobius. I mounted it on a Mini-H quad.
Can you pull a video signal off of it like you can the #16 and the Gopro? I use (well... used) my #16 as both recorder and FPV camera by using a USB cable. Since it's supposed to be made by the same designer, I'm hoping the Mobius can do the same...