Here's a vote *against* the GoPro Hero3 Black edition.
I got mine around Christmas, and it didn't have the current firmware. No big deal, but it took several tries to get it to upload correctly (a known problem if you look at the various forums discussing GoPros).
Then, it would more often than not fail to power on, requiring the battery to be removed and reinserted. A known problem, again. Inconvenient at best, impossible at worst, once it's mounted behind my head in the plane. A week of emails and finally get an RMA to send it back.
Several *weeks* later, the replacement camera shows up. Different problem, will boot up but locks up with just the movie camera icon showing, again requiring removal and reinsertion of the battery. AGAIN, a known problem.
So this one will have to go back, as well. I've now lost a couple of months of opportunities to video flying in my new airplane because of poor quality, albeit rather expensive, cameras. I am extremely unhappy with their QA and their customer service, and if you read their forums, other forums, or the ratings on Amazon, etc., you'll see...this is a poor product apparently made by an amateur company.
I'm now looking for an alternate solution...any suggestions?