I love these new liners. I recently purchased the Gara LV for my Tecnica Mach 1 LV 130 boots. I've had the boots for over a year and had about 20 days in the stock liners. I was custom fitted for them which took a bit of tweaks to adjust the instep and blood flow for freezing toes. I was still having some cramping issues and discomfort so I decided to try the Zipfit route. I've had wraps from Intuition before with other boots and really liked them. Those liners didn't fit in the new boots, but I wanted to try and warm my toes up, stiffin the shell a bit, and feel that heel lock again. I love the Zipfits! They work better than expected for comfort, warmth, and stability. I was nervous about stepping into the shell with the liner on, but once I figured out the angle it wasn't that bad and now it really doesn't take that much extra time. We ski with some others who have some sensitive feet and after making a recommendation they are all doing great as well. I wish I had purchased these years ago. The stock liner was actually pretty good and I thought I was happy with it until I starting using the Gara. Wowzers. I'm not going back.