I'll preface with, I can ride RNR, TOT, Hulk, Dueling Dragons, Kraaken........and feel perfectly fine.
I felt strangely shakey for about 5-10 min after getting off EE. No headache or nausea, just shakey. I loved the ride....and did it twice (and will def do again), but I did feel a tad weird getting off. It's definitely the part of the ride that goes backwards that gets me. I can tell. The rest of the ride is a piece of cake. I love this ride and won't let 5-10 min of weirdness stop me from going on again.
My youngest rode it with me and felt the same way. My middle child would not go on at all and said she heard MANY complaints ranging from headache, nausea, crying while waiting for us in the gift shop. My 19 yo ds had no probs whatsoever riding this.