Many people don't realize why Google maps are so much better than anything out there. I would actually give lot of credit to Marissa Mayer who suddenly became in charge of maps from otherwise more higher position. Thanks to her influence in Google SLT and ability to make impressive arguments, she was able to make a case for maps as core pillar in Google's offering and consequently obtain huge investment and large tal…
This come from an admittedly from the PoV of not using a smartphone with google service, so it's either fully offline maps or online vector maps in the open source, well supported OsmAnd app or using the sluggish google maps website. Also I'm in Germany which has by far the best OSM map quality I have seen so far. And I almost exclusively cycle everywhere and every time I tried using google maps It sent me through some 2km cobblestone road 5 min after starting.
But I still find the Mapnik default rendering style very pleasant to look at.
As an additional benefit I can just fix OSM error on the fly, on my Phone, whether I'm online or offline and queue the update for later. There is really no competition here...
Edit: I forgot one of my main criticism of google maps. I mainly stopped using it in the webbrowser because it was getting sooooo slow. openstreetmap.org loads almost instantly.