My purchase with Zipfit was easy, fast, and accurate. The liners are a game changer for fit, performance and warmth. I have been a ski instructor for 18 seasons and I have a Tecnica Mach 1 LV boot in a 130 flex. The liner makes the boot fit better, perform better with excellent heel hold and it’s nice and firm, yet comfortable in the tongue area. I had the Start Haus in Truckee do the fitting for me. I did buy a Snow Eagle heated boot bag so that the shells would be nice and warm to make it easier to out the boot on. It takes a little practice to get the boot on. I experience all day comfort and performance with my Gara LV. I would highly recommend the Zipfit liner to any avid skier.