We have several pairs of the Liquid Image All-sport Camera Goggles and the oldest pair is about 4 years old. It has been trouble free and they are very simple to use. They give a real "First Person" View and when and if you ever do crash you won't loose them nor will the get redirected in another direction. They have a soft blue light that shines inside to let you know if they are on and it blinks when recording. I have gotten as much as 3 weekends of riding on one charge of the lipo rechargeable battery that they come with. We love ours! Here is a short video that shows how well they work.
https://youtu.be/w_6U7QS2tn4?list=LLAR6 ... JVXjv7PXuQ
I have seen them sell for as low as $89.99 for the All-sport HD But I'm sure that the newer versions are even better. Here is a link to their web-site
http://www.liquidimageco.com