I mean, I'm still running stock and only do very moderate wheeling, so take it with a grain of salt, but I'll agree with the majority of these comments. It's geared well enough that it can handle most whatever you need it to handle at low speeds, just don't expect to go much more than 60 -70 on highway.
The only time I ever get annoyed with it is that I'm in Boston and have to drive far away and through mountains to get to any sort of hiking/climbing/4wheeling that I want to do. So it becomes a trade off of taking the truck lane at 40mph in 3rd gear, but you get a little better gas mileage on those long trips.
Someday I plan on swapping the engine to something more powerful, but right now it's good enough.