 I've had the car for 4 months now and 
have put 7,000 miles on it already, 
including a 3,000 mile cross country 
road trip.  Ran flawlessly, in the 
flatlands, in the mountains and in 115 
degree desert heat.  Never changed the 
temp from 72 degrees and was 
comfortable no matter the outside 
temps.  I've had some work done since 
owning, but all under warranty.  This 
is my second 7 series.  My first was 
an 88 735i.  It had 150,000 miles on 
it and I put another 85,000 on it.  
Never had drivetrain problems.  I'm a 
huge fan of these cars.  I'll probably 
get another in about another 100,000 
miles.