It's very hit and miss, as it's dependant on how many perfectionistic mapping enthusiasts that edit OSM as a hobby are in your area.

It really depends, but in germany (has a large OSM community) OSM has so much better quality & detail for almost everything except buisnesses. It suffers from poor search, routing that doesn't take traffic jams or roadworks into account and a lack of high quality apps and thus only "nerds" use it instead of Google Maps or others.