The navigation unit pales in comparison to that of Honda/Acura. The X5 is nimble, unmatched in its ability to handle quick turns. The acceleration is very good, considering the low gear takeoff. I found the steptronic transmission feature allows for smooth quick acceleration in M3 to M6. The transmission seems to work a little harder in M6 than in D6. I have 5100 miles on mine in 3 months. I really enjoy driving this SAV. The third row seat is only for kids under 5ft and under 120 ibs.
BMW navigation unit voice command needs help. Features should be controlled with display screen, but allow backup, radio, and climate control to be operated without display screen as well. Maybe a few more horses would help: 350hp to 385hp.