I use the Liquid Image Ego. It has built in Wifi which is handy for aiming and viewing whats on the camera while out in the field.
Upsides:
Great Picture video quality
Size
Battery Life
WIFI
Low Price
Easy to use
Micro USB card slot
Micro HDMI connection
USB
Downsides:
Their marketing budget is no where near Go Pro
Buttons are kind of small which makes starting and stoping a little more difficult
built in battery so would have to use USB charger Booster after the 3 hour run time runs out.
Here is a good alternative to brand G and probably the best price per quality and features out there. Including WIFI and free smart phone app.
• Perfect camera designed for extreme sports enthusiasts
A mini-sized Mountable camera that records HD video and is Wi-Fi enabled
• Slim profile will fit in the palm of your hand, measures 1.6” x 1.2” x 2.5” high, less likely to be knocked off by tree branches or flying debris
• Capture 12.0 MP photos and Full HD 1080P videos hands free
• Cutting edge image stabilization technology
• Continuous photo mode takes pictures every 2-3 seconds
• Also records HD 720P at 60 frames per second, 1080P at 30 frames per second for smooth video capture
• Wi-Fi enabled to work with Smart Phones, Tablets and Computers- can control up to 5 units at the same time
• No extra wireless module attachment needed for live wireless streaming, wi-fi range is 100 meters line of sight
• The Ego will accept up to a 32GB micro SDHC card, to record thousands of still images or hours of video
• The camera includes a rechargeable Battery. Estimated battery performance is 1.5 – 2.0 hours of video
• Includes a clear protective cover, universal flat surface mount, and 1 additional adhesive pad
• Many different mounts available for attaching the Ego to many different surfaces making this camera useable in virtually any sport you participate in
• Waterproof housing also available for wet conditions
http://www.gobigparts.com/Cameras-Helmet-Video.html
Found this on Youtube:
http://www.youtube.com/watch?v=SZcSCT4VxdY%5DEgo EGO vs GoPro Hero3 Black Edition - Driving Comparison - YouTube