I didn't have to pay for it, installed from F-Droid, and I can download any map I've tried so far. When I'm traveling I like to pre-download the standard map for the whole state if it's one I don't already have installed. It's nice to not have to worry about data / reception.

Overall OsmAnd is a pretty good GPS-map-navigation app, but has several annoyances and bugs. Still better than using Google's app to me. I need to check out Organic maps too