I use an older Hero2 and it has been rock solid. I am still on the original case even though I have had it strapped to just about everything from my Dog to RC Cars and thousands of miles on my helmet. If you use the vented back on the case the sound is pretty good. All of the following videos were filmed on my GoPro. Keep in mind that the speed of your memory card is the most important thing. Also YouTube kills the quality of your videos if you're not careful when editing. You have to use a format that YouTube agrees with or it will get a little grainy on you when you upload.
https://youtu.be/zPMt6UlLy6c
https://youtu.be/8ZnbX39p0us
https://youtu.be/mt0sHVkTYZk
https://youtu.be/_u2Jxk6cSuo
https://youtu.be/YwSxQptDUtg
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