OpenStreetMap competes during the Olympics (and gets gold).
Top Left is OpenStreetMap, Top Right is Google Maps, Bottom Left is Bing Maps and Bottom Right is the Geofabik interpretation of OSM.
Compare them all here
http://tools.geofabrik.de/mc/?lon=40.28988&lat=43.68848&zoom=13&num=4&mt0=mapnik&mt1=google-map&mt2=bing-map&mt3=geofabrik-topo
OpenCycleMap using OSM data looks impressive too:
http://www.opencyclemap.org/?zoom=14&lat=43.69041&lon=40.30906&layers=000B
sources:
http://opensource.com/life/14/2/weekly-wrap-feb-14