We bought this vehicle for long term ownership and it has not disappointed. In 2005 we had to put about $1200 into some repairs, but that is about it for major repairs (the scheduled service at 60k was pretty expensive at about $700). Lots of room for 5 adults, never missed the way back seat.
With 17 inch wheels, this vehicle sits high enough for great visibility in traffic; feel pretty secure in this large vehicle, and feel great about the reliability.
Ford has used the same turn signal gear in an Aerostar as the Expedition. It fails in a peculiar way, but seems to right itself over time. Good thing, since it is very expensive. Child door locks in the rear lock themselves!