I did the same thing as the OP on our RCCL cruise last year. It was nowhere near the service we got on DCL, and not too far off the price either. our state room attendant was good. Our waitress in the dining room was ehh. The food was terrible. (It's the one cruise I didn't gain weight haha) I couldn't wait to get off and eat something better. DH who is usually not too picky with food, kept saying we could eat out at home (or make food at home) and get better food.
While I did not go into the cruise comparing it to DCL I did find myself doing it as I found subpar service and food.