Yea I was getting a lot of flats especially the rear tire which is heavy on fat bike. Since Mr Tuffy - Zero flats. It is expensive but well worth not having the hassle. On a $1500 bike, $50 more is not really that much more
My LBS will do me front and back Mr. Tuffy for under $50. As a very lazy person, I think this is a good deal. The "Flat-less" tires run around $120 installed so hopefully I am not sacrificing quality for economy.
I just got a flat with tube filled with slime. Seems like it is just a tiny pin hole. So much for that stuff. We do use it in our dirtbikes with limited success, but Dirtbike tires are only filled to 12psi.