Touch wood, mine's working fine now. But it's been effing annoying and its impossible to know (a) if it was just one dud unit or is a common problem and (b) whether even if it is working fine now whether the problem will return.
True, every brand has lemons. There would be some GoPro units out there that just don't want to work. As we're in the process of buying a unit, I didn't want to take the risk so went the "industry standard".