So far I have put 260 miles on my 4.8i and no problems. No question in the first few miles I tought OH NO some hesitation with downshifting etc like mention here but it seems after it learns your driving style if smoothed out.
2014 X3 35i Dynamic Handling Package| Cold Weather Package | NAV | Premium hi-fi system | Driver Assistance Package.
2013 335i Sportline | M-adaptive | HK | NAV | PDC | Heated Front seats |6-speed MT.
2011 X5 35d Great SUV gone
2009 C350 Mercedes Gone 7-31-2012, good car but boooooooooring.
2008 X5 4.8i - Turned in 1/24/11 They created the Lemon law because of this SUV.