Now with that said: so much work has gone in to Android (and by extension, Graphene) to improve on power usage/security/etc that I'm not sure I'd bother to actually run a mobile Linux device. The juice just doesn't feel worth the squeeze.
I know I would love to give them a try, but a 720 screen is an absolute non starter for me. It would be hard for anyone to sell me on just a FullHD (1080) screen in the era of QHD (2K) being industry standard. Additionally, I believe their FAQ even admits that their already low power devices only get a few hours of battery life.