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’ll sometimes contribute when I’m travelling to more rural areas which are less likely to be well mapped. The experience in my country has been that cities are very well mapped on OpenStreetMaps with a lot of detail, often having more up to date information than Google Maps. Less populated areas usually don’t have as much detail, but the basics, like roads and buildings are usually well mapped.
I’ve also noticed OpenStreetMaps is awesome for trails and smaller roads used by hikers, usually being much more useful than Google Maps.