[astrobase_go]

Depending on which version of Android you're running, you may be pleasantly surprised. Manually encrypted an HTC One m9 (Lollipop) and found no noticeable performance decrement, and now with it enabled by default in Marshmallow it's unnoticeable.

[Flimm]

The main annoyance with full-disk encryption on Android is that it disables several handy features of the lock screen, such as being able to take a photo directly from the lock screen.

[fwn]

I just checked that on three devices and I am certain that this is a problem unconnected to encyption. Not sure how, but you might be able to solve this somehow.