 We have owned our 2006 Quest for 2-1/2 years.  It has 61,000 miles.  All recommended service performed by Dealer. Although the van has been reliable till recently, the transmission went out two weeks ago (1,000 miles outside the warranty period).  After much (too much) debate and pleading, Nissan covered the repair ($4100).  When we picked the van up from our dealer, the windshield was busted... we're still debating their responsibility.  I find the seats to be very roomy but uncomfortable.  Front seat feels like you are sliding out of them toward the steering wheel, makes you kind of hold on to wheel to brace yourself all the time.  Original Goodyear tires were noisy and wore poorly.