Michelin changed the compound on the new and improved MS2. I recently had some installed on my truck. They rode really nice when not towing. Hooked up to my TT and the truck felt like it was on ice. They replaced the POS Firestones on my Ram 3500. While those tires didn't last very long they were much better at controlling the truck when towing.
Went back to Discount tire and told them what happened. I put 2000 miles on them. They gave me a 100% refund and I got some Cooper AT3's. Much better than the MS2. Stiffer ride but my truck goes 50/50 towing and DD so I'll live with it.