On November 10th we disembarked from the Navigator in Tampa, having cruised from Montreal (24 days in three back-to-back segments.) We were just forward of the mid-ship atrium (in 631, a delightful suite with balcony) and had no problems with vibration, although we did feel it in the show lounge and casual restaurant (both aft), quite noticeably one time when the captain was trying to make up time. The aft portion of the ship is where you may notice the vibration, particularly when the ship is moving fast. I don't recall much if any noticeable vibration on that first segment - between Montreal and New York. Unless you are a "princess and the pea" type person, I don't think you'll really be troubled at all on board the ship. The food on the Navigator is arguably the best afloat, the crew super-smooth and attentive while still friendly. Overall: Great ship!