Yes, I am glad we did it. Everyone really enjoyed it. It was very relaxing and yes, romantic. I didnt tell them until we were in Epcot that day.
One thing though, after walking around Epcot all day the hike to the marina was rough. The thought of hiking back was rough on everyone so we asked to be dropped off at the Epcot exit. By being dropped off, we missed a one hour ride back to the marina. I think that is also why I felt it wasnt worth it. If you could somehow get your car parked by the marina, that would make it even better!!