I live in the land of -30C and we've had our Jotul 400 Castine for several years now and it's been superb. I burn birch (hot and clean) and spruce (free). If I had the opportunity to build/remodel, I would put in a much larger stove and use it more to heat the whole house. Due to our floor-plan, though, I mainly use the stove to take the chill off the central living area where we loose heat through too many windows (but love the light!). If I'm not careful, I overheat the house, and have to open windows. Some year I might invest in a fan or 2 to move the air better.
I start my fires using a 'top-down' method, except I use birch bark instead of the newspaper knots. The f400 is a smaller stove, so this technique works best.
Stay warm and cozy,
"Unfortunately, humans rely less on instincts and more on culture to determine what they eat" - Marcia Pelchat