This is exactly my opinion. On our first cruise, we were in a CC suite and booked quite a lot of speciality restaurant nights, however, I enjoyed the MDR. This year we only went once to Prime C which was the least enjoyable dinner due to the long wait for food and a rather noisy big table next to us, which took over the whole room in the back of Prime C. For the rest of the cruise, we enjoyed excellent dinners, breakfast (and one lunch) in the Main Dining Room.