I rode it yesterday. My husband and son rode it first. They said they didn't think I could handle it. I gave it some thought, but decided to try it anyway. I'm glad I did. I enjoyed it. It's not nearly as intense as Rock N roller, but it got my stomach. I sat in the 4th row and found the ride to be very smooth. My husband and son sat in the back and found it to be very jerky.
I would say that it would be VERY scary for small children for many reasons. First, I'm 4'11''. I felt the safety bar could have gone down further than it did. 2nd, I slid around in the seat, (side to side). 3rd if they don't understand that the Yeti is make believe, he could be very intimidating.
My son rode the coaster twice. The first time he felt completely disoriented when the coaster began to go backwards. At one point he couldn't tell if he was going sideways or upside down. (It does NOT go upside down.)