I haven't used it (no devices that will run iOS6), but from the numerous stories I've heard, the problems, while obviously absurd, don't seem to impact a majority of iOS device users, and apparently in most metropolitan areas, directions work just fine. But some of the more-rural areas have issues--heard recently that a tiny farm in some rural part of France or the UK was labeled as a major airport...lol!
But it's still perplexing why apple would intentionally release a product with such obvious flaws. I know the "if Steve Jobs were alive" comments are getting very very old, but it has some validity vs. how the company got as far as it has--after reading the SJ biography, you get some bit of insight into what was not okay, and a "mostly-working" product was never acceptable, and one with obvious flaws was usually canned.