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 have done 14k edits over six years. I too like it for being therapeutic. I'd rather do micro-edita on osm than play another level of candy crush. Same kind of reward but you are also helping out creating something larger!
Honestly though, I don't think osm will ever catch up to the commercial alternatives. Mostly because their harsh stance against automatic edits (and lack of version control). Also the lack of standardization is a problem. It's very hard to create client applications because the data is structured way different in different regions.