So we've had the quest for a few weeks now and just took our first trip down to NY. In 200 or so miles we averaged 60 MPH and 26.2 MPG according to the car's trip computer. Given that this was on regular gas, this seems pretty good. (Nissan suggests premium but says that regular is OK but will result in lower gas milage)
Overall, the quest has lived up to hopes and expectations. The 3.5L 6-cylinder engine is more than powerful enough -- it might even be more than is needed for around-the-town trips. Getting the kids in and out is a breeze, and the amount of storage space is just plain crazy! The DVD player and 6-CD changer makes long trips go much faster.
There are a few minor nits... There is a flip-down center console which itself is handy -- you can store a bag or other stuff between the front seats -- but it has the only cup holders available for the front seats. So when you have it down, no cup holders. The DVD player for kids old enough to controll it themselves would be fine, but is very hard to controll from the front seats since you can't see the monitor. Like I said, minor nits.
All in all the transition to the dread mini-van has been a success.
