I got these boots for my backcountry set-up and finally used them (inbounds at Snowbird). It's a super light boot but is still stiff; coming from using the Fischer Trinity (a really stiff race-type boot) I was pleased by the flex index being nice and high. My only issue with these boots is the fact that the tongues punched into my shins and left bruises. It made skiing them fairly painful, especially when I hit the crud wrong. Since they're a complete therma-fit liner I'm hoping a few small tweaks will sort this out because these boots are great.