I like the fact that the spikes are moulded properly and both tires are the same in one packet, but that might just be me being picky?
As Ben said I ran them for a full day at Batley when they first came available. I did a couple of practice runs, 4 rounds and the final and finished 2nd? I think. They did 'go off' in the final, but that was after 30+mins running. They do 'look' like they wear very quickly but I found the grip is still there so kept running. Also as said earlier, Rears and 4WD fronts come with foams, all for a cheaper price than Schumacher's + foams, hence I'll be running them at regionals/Club events this year.