I have used this camera a couple of times since receiving it for Christmas. I have used both the strap mount for my vented bicycle helmet as well as the permanent stick on mount for my dual sport motorcycle helmet. In both cases, the mounts work as well as the camera. I still have the previous generation GoPro HERO in standard definition, but not in the wide field of view lens configuration like the current HD version. I like the wide field of view of this HD model. It is great at giving a very good view of both the trail as will as your handlebar movements while riding both my mountain bike or motorcycle. The quality of the video is fantastic. The files do get large, but that is to be expected with the high resolution of this camera. I have been using a 16GB SDHC card and have filed up about half of it on one battery charge. I would recommend a high speed card reader to improve the download times from the card. A 12 min video was nearly a gigabyte. The battery last I think longer than the previous standard definition camera which ran on AAA batteries. I think that I will buy an additional battery someday for long rides with lots of action.
The only reason I have not given it a full 5 stars is the difficulty in reading the small status screen with all the various modes it has. The same issue I have with the standard definition HERO. The icons that tell you if you are in burst, still, timed, or video mode are very small across the top of the display. The numbers to tell you the number of pictures or videos taken are much larger. It is just difficult if you have the camera mounted on top of your helmet and you try and look in the mirror on your bike to see if the camera is on and what mode it is. You have to use the select button on the front to both turn the camera on and select the right mode. The shutter button is on top and is easy to operator even with gloves. It is not difficult to read the display if you are holding the camera in front of you, but much more difficult when mounted on top of your helmet. You can unclip the camera from the mount, but that can be difficult when it is on top of your helmet.
I am looking forward to the expansion port options being available, like the LCD screen to view the videos in the field. I am also thinking of investing in the chest strap mount so I can get different view over the handle bars as will as making it easier to see the small status display. Other than the small icons telling you which mode, this is a very nice camera that takes very high quality action videos. It is very small and light and easy to use when you have it in the right mode. I would highly recommend this camera to anyone wanting action videos of their bicycling, motorcycle, or skiing activities.