I've been extremely happy overall with my Interco SSRs. Excellent in the mud, dirt, rocks, deep snow, and sand. Decent on ice and on the road (way better than I expected here). The only con is the rubber compound is pretty soft and I've had some pitting and chunking after hard use in the rocks, but this is to be expected to some extent and I've never had a sidewall puncture. Also they're pretty noisy, but if you're considering Iroks my guess is noise is not an issue for you. They are not easy to balance - will need to check your air pressure and balance/rotate often. Do that and they should wear evenly and last a while - I have over 50K miles on mine and they still have a little life left in them!
07 Jeep Green Rubi Unlimited, auto
Mods: Tuffy Cubby Storage Cover, Rugged Ridge grab handles, Shrockworks Sliders, Rock Hard Engine / Gas Tank Skids, Rhino-lined tub, Kilby Evap Can Relocation Kit, 16x8 Centerline Wilderness Series - Falcon Rims, 285/75/16 Interco SSRs, OME 2" HD Lift, PSC Diff Covers, Superwinch EPi 9.0, BulldogFab Rear Bumper, RedrockFab Front Bumper and skid