For a van, this is an economical and reliable model (much better than the Ford Windstar I owned previously). No major repairs required, just tires, oil changes, transmission fluid change. It has recently become noisier (air leaks, rattles, body integrity issues - NOT the engine - it is fine). Seats are not as comfortable as other vans - could use a little more support and/or padding, as well a little more leg room for rear passangers.
Reliable! Bought this 2000 Quest used with 45K miles and have had 1 1/2 years of trouble-free service!
Improve body integrity - hydraulic lifts on back door, interior light fixtures, paint on luggage rack. Make rear seats easier to move and remove! (They are very heavy and it is difficult for me to move the seats and change the seating configuration.)