Bought new and still love the van. None of the problems some others on this site seem to have; just new tires, oil changes and recommended maint. Still getting 20 mpg in town and about 25-26 hwy. (Yes, I do drive it nicely - most of the time.) Excellent size for running around town and adequate storage space for trips.
Size, reliability (so far), decent gas milage, ease of exit/entrance (for grandpartents!), easy flip over rear seat.
Nothing major. I realize a minivan is never going to be a Ferrari. Zoom-zoom???