Pretty flexible, but not choppy at high speeds. Bought this board for my AK trip last year. Despite my first time in deep Pow, and riding a 149, it schralped quite well. Also performed well in the tight woods and bulletproof snow found in the ADKs. Overall, a great board for the buck.
BTW - There is no Magne Traction, and it is not a true twin. It is setback.