Been using an Android EFB for the better part of 7 years now. Ended up with a Samsung Tab Pro and an awesome program called Naviator. Checklists and performance charts on PDF, W&B programs in Excel. No problems at all, and any time I came across a roadblock in software or hardware, the Android community out there always had a solution. Great setup, at least for flying in the US.
A lot of the guys and gals I fly with using Foreflight spend tons of time heads-down, there is just so much info in that program. They also are jealous of the quality of my lunch, as they spent most all of their lunch money on their iPads and the annual software fees.
YMMV.
Mike