I ran the Continental Sprinter Gatorskin last year and they lasted well, punctured a couple of times but nothing that some Stan’s sealant didn’t fix. I then went to Vittoria Corsa Elites – these are a cheaper version of the CX, i think they where £28 or something. Lasted up until this Christmas without a puncture and no need to add sealant. But the ride compared to the Gatorskins was night and day, I can’t see the point of Gatorskins as they take away half the reason for riding tubs – the ride. I have since switched to 25mm Pave’s – the newest version. They are expensive but ride lovely, thing is they don’t ride twice as well as the Elites, also due to the latex tubes in the pave’s i don’t feel as confident putting sealant in them. The elite’s use butyl tubes so it’s not a problem, I will be going back to the 25mm elite’s once the Pave’s wear out – which i don’t think will take to long looking at them.