Well, we took the JK out for it's first test offroad yesterday (ours is a CRD Manual Unlimited with 33" Tyres) and just thought I would share some impressions.
If you are attached to your pretty moulded rear mudflaps, don't take it offroad. Ours lasted only an hour and a half in the mud and rocks. They came home in the boot.
Why would they make a car with excellent dif clearance but then have the mid mounted fuel tank sitting lower than the dif's? Doesn't make too much sence. We can't wait for the Terraflex Budget Boost to arrive as we dragged the Bash Plate to buggery (it's looking decidedly second hand after one trip). For any mud/rocks sort of offroad, 2" lift is essential. For some reason, the side steps came out unscathed!
Low range in the CRD, bloody awesome! The throttle adjustment which happens when you lock it into 4L is awesome (but takes a little to get used to, almost like driving on a flat tyre). It just crawls down hills and idles up them. A little Turbo Lag is apparant up hills from low rev's but nothing to worry about.
The traction control get's annoying on rough dirt roads, keeps cutting in on corregated corners (granted, being taken at high speed). The Partial Off Mode fixed this really well but something to be held in mind.
Overall, with a 2" lift and 33" tyres, it's going to be a weapon!