When my tall, brave almost 5 yo DD rode RnR she LOVED it. We rode in the middle, her and her bigger brother, and me and DH.
The second time we rode she started to howl.
They brought things to a halt while everyone gave dirty stares to us for "forcing" a tot to go on RnR.
It turned out that what she was screaming about was that I was making her ride in the (smoother) center seat with us. Big Brother was in the back row and had told her he'd "pull more G's" than she would with me in the "baby seat. Just to show us she rode with her hands up the whole way.
The middle on the RNR is much smoother than the back.