I have run MT's on my expedition for years and love them. IMHO, great in snow. Never had a problem with a ton of trips into snow country for back-country snowshoe overnight trips. I probably get 55k out of them before I replace. Only thing I hate about them is the price.
Also, the ten ply has kept me from getting flats. I always got tons of flats on other tires, but not with the MTs....