I’ve tried using it over the years but I never liked it because there was no information. So last night I looked at my local city and there is almost no information at all. I spent a few hours last night adding buildings and restaurants and removing incorrect items. It was actually kind of fun and therapeutic and I plan to do more of it tonight. My girlfriend thinks it’s dumb and I’m wasting my time because Google maps and Apple maps and Bing maps exists but she just doesn’t understand open source.
Edit: Apologies, I just realized this question is not Linux specific.
I regularly use OSM data through Organic Maps (mostly for larger European cities). The app is really polished and is a joy to use. So far I’m not missing any features from Google Maps.
I’ve also updated some faulty business hours for some restaurants so I guess I’ve contributed back.
E: With the recent developments in the world of free online services (YouTube blocking ad-blockers, Google lying to their customers about its TrueView ads, Twitter rate limiting free access, the Reddit API fiasco), I wonder how much longer we can take free services like Google Maps for granted. Having an open alternative may become even more important in the future.