In case this thread gets searched, I have all of two days on these tires but I am liking them so far. Very much like gatorskins but with mini knobbies on the side. At first the 1.75 width looks a little odd on a MTB but the knobbies save it from having that hybrid look. I think they roll well for me, I can keep my hardtail MTB at 17mph on the flats with an even cadence, modest effort. I've thrown them into a corner with some loose gravel and dirt, and they just powered through. The brown thatched sidewalls my not be to everyone's liking, and the tire label is very overdone...you can read it from twenty feet away.
That is all.