I've had my Explorer for about half a year now and am impressed. It has 122,000 miles on it, the engine doesn't leak, no wear on seats/plastic pieces, and still goes straight down the road. Like with any vehicle if it is taken care of from new, you will not have many problems. Mine is like new after 122,000 miles!
Great trip car. Very smooth on highway. Can carry 7 passengers.
Tranny issues have just started for me. Probably around 1800 to replace. But not bad considering it's the only thing that has to be done.