6' 1", 175lbs. and fit just fine. There's a tendency to complain on boards like these, so the problems seem more out sized than they are. If you're used to and demand a certain level of seamlessness, the M3W isn't for you...be it new or used, upgraded or not. If you really enjoy being at one with a machine (and nature) there's nothing like it.
You can't use the typical logic in justifying it's purchase. Go drive one and see if it moves you.