Hasn't been much of an issue for most for some time now. Not as good as Google perhaps, but even Google isn't always right either.
I literally get wrong directions at least once a week. Like horribly wrong. Assuming I can find the POI in the first place through Maps. I keep trying though. I'm not sure why. I guess I always hope it'll be right so I can shut up about it
(By the way, I use the Report a Problem button whenever I find something wrong and some things have been updated in the past. Progress!)