I use the HDPRO2 drive to bike both on the road and on the racetrack. I am fully satisfied with the action. I have bought me as a second camera to my GoPro Hero3 silver that has cost nearly 400 times. A direct comparison of image quality makes me the HDPro a sharper and more colorful image. The monitor is on the HDPro class, both in the picture (treble) setting as well as the menu functions. The pity is that the housing is compatible with all GoPro mounts only by the drilling of the central hole. However, is not a big expense and in 5 minutes completed. Only with the operating buttons I was initially disagree, as they were very difficult to operate and mediated absolutely no feel of the keys. My solution looked like that I have sprayed with WD40, the sealing rings, so that they now easily go smoothly in the guide.
My conclusion: A really great camera that keeps its promises se, with one, two small teething problems but these are very easy to fix. The control via smartphone works flawlessly. Conclusion: More camera I can not wait for the money