Very good tires! I got these tires to replace the XO1's stock tires, there is quite a bit of trimming needed to get them to fit but it's well worth the effort!
More about the tires themselves; at first I didn't think too well of them because of my choice of compound (it was ~57°f at night when I tried them first) but the next day when I took them out it was somewhere in the mid 70°f and they still felt a bit on the hard side, but once I drove around in them for a couple minutes and built some heat into them they grip HARD, was not expecting to get so much grip out of them! Couple runs later and I love these tires! Biggest gripe with them is my choice of compound(I got the S5 and now looking back I should have gone 1 step softer) but overall I love these tires and I will gladly be putting many miles on them. Very good quality, glue job looks perfect, balancing is near perfect, and they don't break the bank!