My WJ never let me down once. The fuel economy is eh, mine had the 4.7 and averaged 17 mpg. Best I got was 19. They're easy to work on for the most part, parts are cheap. The only thing I didn't like about mine was the 99-01 Teves brakes were prone to warping the rotors, though I put new brakes on it and they never warped in the 50k I put on them. The steering stabilizer is another thing to go bad. They're cheap too.