The issue we have seen is that is harder to get on and off. Its really no harder than a full lace up liner where you put the liner on first and then step into the boot and for this reason I had kept it in the highest flex 130 and 115W boots but we have had pushback that these consumers still do not want to have the extra step of how they put the boots on. For this reason we have changed the liner and have something really cool coming next season. That liner will be offered as an aftermarket liner so you can get them for any boot. Maybe worth waiting until next season for that new liner but get the Mindbender boots now if you like them before they sells out.