I had a little trouble getting this saddle cover to fit tightly, it took some effort to get the ties real taught and to cross tie them under the seat.  It worked pretty well for a while, but then over time it felt like the gel was breaking up and then I left the bike in the sun and the gel started to melt an ooze out of the material.  That was it, it was ruined.  It lasted one season of riding.  Felt good when it worked.  It did the job of getting me acclimated to my bike seat.  After a good season of riding i didn't need it any more, the standard saddle is fine.