I spent a few hours in the field at a whitewater event with one of the GoPro tech guys. He didn't have a Karma on him (he did have a production Karma Grip). He'd spent several hundred hours recording GoPro sponsored stuff and was totally rock solid on its performance. I was shocked by the total recall, but as a retailer who sells GoPro, and has a relationship with them, I can't imagine this thing not starting up again pretty soon. The amount of money and resources they have tied up, not only in R/D, but advertising and word of mouth - factor in the improving competition, and this will put an enormous dent in their armor.
As soon as this thing ships again, our store is getting a demonstrator for us to use. I will say, though, I'm even more shocked by the complete radio silence from GoPro...