I have Lange Fluid 90's I purchased 4 years ago. My feet are narrow and I've always have had difficulty finding shoes/boots that fit well, which the Lange boots do. They are snug in the heals and sides without any rubbing or issues.
So after skiing these boots 1 year I bought a second pair as a spare, (it was a great price). I am an advanced+ skier, weigh 150 lbs, and ski mostly trees, bowls and powder in my home state of Colorado. So far I've been happy with the boots. I have a friend tell me the flex of 90 is not high enough and I should look at a stiffer boot. Any ideas if this is true or not?