Lightest perfromance 4 buckle mountaineering boot I've tried on. Great fit. Tight around instep and heel. Liner is light and warm. Best when thermofit by bootfitter. Skiing performance is phenomenal. Skiing on Coombas with dynafit bindings and it's plenty stiff for a 100mm+ waisted alpine board. Bottomless feel to the flex. Walk mode easy to open and lots of mobility in the cuff. Full strides save steps and energy on the up.