I don't know...I'm better at pressing buttons faster and correctly than moving my wrist. I would imagine myself not dashing, getting wrong inputs, and doing this consistently with practice. Not to mention the time and money needed; both of which I lack. I don't think I would ever spend 150 bucks to improve on a game--not to mention it's a gamble in and of itself. Also considering that there aren't many tourneys for anything in my location, I feel no need to get it, and instead, use the time to practice, and the money on *more important* things.
That's just my take--I'm sure others find sticks a godsend.