This weekend I was driving all over the NYC area when I saw that iOS6 was available. Stupidly, without reading reviews, I updated hoping to get the new verbal turn-by-turn directions (the old iPhone navigation app was pretty much worthless if you are alone in the car as it did not have any verbal output).
I then spent the rest of the weekend following bizarre side roads, on tiny dirt roads, or getting instructions to turn a couple of hundred yards after I had passed the intersection. At one point I got send off the highway on a 3 mile detour through some housing tract only to eventually be put right back on the same highway I started, about 100 yards from where it had me turn off. I am sure that it will improve in the future, but right now the new Apple nav program is a half-baked mess. My old Android phone was better for navigation three years ago, and I am sure Google has improved it since. If I had to drive a lot on business trips, I would be back on Android in a second.