I looked at it but couldn't convince myself to do it. I like that you can use the camera zoom (up to 4x I believe) and the different pin shaps and colors. The video recording feature was the part I really liked!
But too many issues I think. Battery life, bad weather, application issues...Can you imagine not being able to shoot because you had to reboot your phone???
BTW, the bracket can be purchased from Firenock for $99...