I run Insa Turbo Saharhas on my Disco.
Good points;
There cheap
There pretty good in mud
They have reasonable self clean propertys
There not 'that bad' on the road, even when pressing on, and they do break away quite progressively.
Bad points;
I get a hell of a lot of 'wondering' above 65mph
I get quite a lot of tyre whine
Even in the dry, standing on the brakes reasonably hard will result in locking up
In the wet, there pretty poor. Nope. Make that very poor, especially when pressing on. lifting off the throttle mid corner will result in moderate amounts of oversteer, so be quick with your hands
otherwise stopping two tonnes of Land Rover swapping ends can result in sweaty palms.
In fairness though, there just not an 'on road' tyre. With this in mind, I'd still reccomend them.