I have only had an Sbar and it doesn't seem as twitchy as my mini velo and similar to my Xootr Swift. I live in windy Wyoming and the Mbar position would be too much drag for me. I have ergon grips and 4 in bar ends and like to bend over when fighting a headwind. However, 4 hard back kibrary books, a 22oz water bottle, a wire cable lock and my 2 lb tool roll in a front bag on the stock front bag mount and it isn't twitchy at all and the ride smooths out too. I am only 5' 7" so that might be a factor....however the pentaclip can give you a little extra set back.