There's both the danger of being sold too short, and also too soft a ski. But I think too short is more often the problem.
Before I bought my skis, in fact, before I even start demo-ing, I asked this question in many different ways and different places: for a very light weight, (somewhat) advanced bump lover, is it better to go to a (stiffer) advanced/expert ski? Or is it better to stay with the softer intermediate-to-advanced ski but go to a longer length?
Most of the answer was to go to an advance/expert ski of shorter length (and learn to flex it)!!!
So I tried the Burning Luv and couldn't flex it unless I'm going fast, or really WORK on it. Not having any days left in the season, I ordered its softer sister One Luv at the same length. But had I had time, I had in mind to demo the longer length for comparison.
Now, getting past the sale guys in the shop, is a whole different matter. They (more than one occasion) all looked at me and said "that's too long for you" (I LOOK lighter than I really am).
I found I can simply over-state my ability to whatever degree to get the ski model I want to demo. If I want race ski, I can get them by pretending to be a racer!
But I can't persuade them to give me a longer one, of whatever model!!!
