Love this bag. 29.5cm Technica Agent 110 boots fit nicely in lower/zippered boot compartment.
Recommend you think about how you want to use the bag. In my case, I never want my boots to go with checked baggage. I always bring them as carry-on. And this is a great bag for that. But if you load up the upper section as some have acknowledged you can, there's no way to get it in the overhead compartment of the plane (and then the flight attendant will take it from you and check it .. bad). In my case, I carried a second pair of (juvey) Nordica boots, a couple of miscellaneous items, and it was fine in the overhead. It was getting a little on the heavy side, though. Helped to have a rollaboard to wheel it around.
If, on the other hand, you're comfortable checking your boots with the airlines, then yes... knock yourself out and load this puppy up. Lots of room for helmet, goggles, clothing.
Build quality (and smart design) is what I've come to expect from Dakine packs/luggage.