I have been running on a set of Insa Turbo Ranger 235/85's for the last 2 years.
On the whole I think they are great, I tow a lot with big trailers and they work fine, snow no problem and off road they will take you most places. On some of the West Argyll runs I have got through sections that people with Mud Tyres have failed, would highly recommend them!
Best of all having bought cheaper tyres I have now got a second set of wheels and tyres with Special Tracks fitted, they are something else off road but I don't fancy trying to stop a 3 ton trailer on a wet road with them!