Pros: Perfect fit, endlessly customizable.
Cons: Fit so well that I can't wear toe warmers. But feet rarely get cold.
These are the first high performance books I have owned. They were fitted by an excellent tech at a specialty shop over the course of a couple of hours. I am not an expert skier, but these boots have helped me reach advanced skiing because when the boot moves, so does the ski - immediately. I love these boots in every way.