This is a bit off topic, but do you know how to fix a "Card Error" with the sd you use in your cam? I bought this BlackBox last week and it worked fine for a few days, but now it displays "Card Error." Formatting the card using the cam menu doesn't do anything, and doing it via my pc just gives me an error that it isn't able to format.

I ended up using two A118's like the OP. You have two independent SD cards and both front and rear shoot in great quality. The main problem I see with dual channel cameras is the poor quality of the rear facing camera which is partially limited by the ability to write two streams of videos to 1 SD card.

Here's a link to the A118 I bought a while back. They've been going strong for 3 years (front) and 2 years (back)

But now that the A119 is out with a similar stealth form factor and better sensors, I would go with that.

Also, avoid the mistake I made of buying a SanDisk card. SanDisk cards are notorious for not working well with dash cams.