I've been using RR on my ZL1 and it's pretty great. I have a small feature suggestion that should, in my eyes, be useful and won't require a lot of work to add - "Show Mode".
Basically the idea of it is that it takes a screenshot, and sends you to an empty lockscreen with it as its background, maybe with CAF enabled? but definitely with no onscreen buttons for calls and such- so when you give someone your phone to look at something they won't be able to snoop around in it. When you release the temp lock, or proper-lock and unlock, the screenshot is deleted.
Since RR already alters the power menu, I think it's probably the ideal place for it.
Hope this gets taken into consideration, and thanks devs for the great ROM!