I just tried RnRc for the first time last week, it was really great. I have been on SM many times, and went on it the day before I tried RnRc. I liked RnRc a lot better, after the take off it is a lot smoother ride than SM. One of my DS's (age 11)doesn't ride roller coasters due to the drops, he was very nervous about this ride but wanted to try it, and he loved it!
I have never been on TOT (I don't like straight drops), but DH said since they installed the seat belts it was a lot easier to take.
MS is something that seems to affect everyone differently. I've heard from people who get motion sickness, that they were fine, and some who weren't, the same thing with people who don't normally get motion sick. I am not prone to motion sickness and was feelling a little queasy before riding (I know this was from not getting much sleep my first night there). I was fine, but I had to really concentrate to keep my eyes open and to keep taking even breaths. The impulse to hold my breath and squeeze my eyes shut on take off was very strong. DH and DS's liked it, one DS was fine, but the other was a little disoriented for about 3 minutes after. He said he closed his eyes involuntarily.