Sorry, Diane - if I had seen this earlier, I would have told you to jump all over that upgrade to the Navigator Suite. I would have KILLED for an upgrade like this. Vibration is not bad at all midship - the ship does shudder a bit in the back. Motion sickness might be a concern but don't think a major one. :(

I'm assuming that you have a balcony cabin? You'll still love it - had a grand time in one on our Navigator cruise!

Masaki