We've got two sets (35" and 44") sitting at the shop waiting for a vehicle to go on. From everything I've seen, there isn't anybody who is disappointed with the performance. More and more comp teams are running them. Personally I'm not a fan of massively wide tires, so that kinda kills 'em for me, but they're supposed to work great. Besides, it's nice to see somebody running something other than Krawlers, Creepys, or TSLs.
-----Matt-----