IMO, based on the one time I've ridden it (no loop), it was incredibly rough for a wooden coaster. All three of us walked off and had to sit down, including the two in the front part of the car and me in the back.
It's not the side to side or the up and down that killed me, it was the jackhammering of the train back and forth. I was being slammed into the back of the seat.
But, you'll read conflicting reports on this message board, so it's a crap-shoot. It may be smooth, it may suck. It's that inconsistency and the roughness that has me swearing off SOB. I rode it, I'm over it.
But that's just one 24 year old man's opinion.
SMD