These look pretty exciting. I was afraid they were going to change a lot of things I love about my MLX. So far, it only looks like the adjustable holder went by the wayside. If they offer more volume, and if the heel pocket remains deep, they'll be unbelievable. Krev (I think) mentioned the absence of negative space in the MLX. He wasn't kidding - I can't wear a different sock in mine than the one I was wearing at the time of baking without noticing. The Haglund bumps I was developing before switching to MLX completely went away very quickly when I started wearing them. These deserve a serious look by everybody.