Med4bike: After I boarded the Voyager in June, I asked to have a cabin further forward, as I remember my assigned cabin was near the rear (779, I believe). They accommodated me, gave me a mid-ship suite, and I never felt any vibration at all during the 10 day cruise. I even visited one of the stern cabins on a sea day, and didn't feel it. If you are really vibration sensitive I would recommend that you go further mid-ship just to make sure. Your TA could get you assigned to a particular cabin to guarantee that you will not be bothered. On my two cruises on the Navigator, I felt the vibration more pronounced than the Voyager, particularly in the theater and the Portofino restaurant, but not enough to keep me away from these venues.