The sunroof design has probably already been adjusted to solve that issue by now so new cars should be fine.I heard some of them from reviewers, especially the sunroof rattling. However I didn't know about the lane centering tech that pretty much limits to city driving. Mazda may not have the advance tech in this department but the driving dynamic is wonderful. Yes MPG drops down with the weight, AWD, turbo, and 20" wheels. I rented the CX-9 last year in SoCal and really enjoyed it once familiar with the vehicle size. My daily driver is a compact sedan and looking for more cargo room and power.