I bought a 92 4-door XLT 4WD used in 94, and drove the car for 8 years. For the most part, it was reliable and cost-effective. Everything was OK until the 5 speed trasmission developed a slow leak and ran out of fluid, evidently due to a design problem that caused lots of Explorer manual transmissions to fail. There is some kind of issue with the suspension resonating at highway speeds, which was allegedly why Ford recommended the low tire pressures that led to the Firestone fiasco. My Explorer exhibited a little bit of the shaking problem, but it was still acceptable. I got my money's worth out of the truck.
4.0 V6 -- adequate power, reliable
Durable interior (still looks good for a 10yr. old vehicle with 110,000 miles)
5 speed transmission and suspension had design issues. Other model years might be better.