I'm kind of at a point with the nav where I don't dislike it, except for one feature: the incessant "Make a u-turn" instruction when you miss a street (or intentionally don't want to take its recommendation). A u-turn is the hardest of all driving maneuvers - often impossible and always more difficult and dangerous than circling around some back streets. I've noticed that the demand to make a u-turn can go on for well over a mile even after any of my other navs (iPhone, android, etc) would re-calc on the fly and work from the new de facto route. If there was a way to permanently disable "Make a u-turn", I'd probably be at about a B- or maybe even a B rating with this nav system.
2013 X3 28i
1997 Merc C280 Sport
Retired: 2005 X5 4.4i ... 2002 540i ... 1999 M3 ... 1997 328i ... 1988 535i