Pretty bad, to say the least i am on the first name basis with GM,sales manager, service department manager, BMWNA, etc..
Seriously they tried to eliminate rumbling noise from midsection of the car/2006 x-5 4.4/ for 4 times in a span of 3 months, keeping car at the dealership for 3-5 days. Finally they as well as ''expert'' from BMWNA concluded that the problem is unfixable, and my AD ordered 2007 x-5 4.8/ same options + comfort seats and same color/,
Thanks Alex