There's a long thread on this somewhere. Some swear by inov8 and othersd swear at them. I have had 3 pairs of 290s, and the fit blister wise is totally unpredictable. First pair were great after a lengthy wearing -in, second were great straight out of the box, 3rd do 10 miles then lacerate my heels. Frustrating because I like them apart from that, but think I'm going to give up on them. Walshes have never let me down.