Fire Phone - Few questions before I buy.

I am contemplating on the fire phone available via ebay for 0 (with prime). I am on AT&T (in the US).

Those who use the cyanogenmod, Pl comment on the below:

1. Has it been stable? Call quallity, Data (LTE), Battery etc.
2. How about the camera quality? What's the bugs with camera?
3. Also does Google maps & navigation (voice guidance) work well? [I don't want to use another other GPS app.]

Anything fundamentally different compared to other android phones or to be aware of?

thanks