I had some Thor Quadrants I bought used. I got about a year out of them and the sole separated. I don't know how old they were when I got them so can't say anything good or bad. I am a tight ass and figured any boot was better than no boot so I bought a brand new cheap set of Fly boots at the dealer for $85. So far so good but only have 3 good rides on them. My riding buddy swears by Alpinestars Tech 10 boots.