Some initial thoughts on my RPi2 compared to the original RPi and FTV.
- Performance of the Pi2 is significantly better than the Pi1. I was never happy with the Pi1 performance - mainly UI navigation rather than playback. The Pi2 is miles better.
- Although I've only briefly used it, I would say performance is about on par with the Amazon Fire TV, Live TV playback is much better so it appears - but that's more an android specific issue rather than the FTV specifically.
- I use the Eminence skin, menu transitions are pretty smooth with minimal lag between switching menus.
- Playback seems fine, I've tried a few 1080P rips, which played back fine. I'll try an uncompressed on at some point to see, but certainly ~10gb rips playback fine.