Our family of four sailed last summer on the Grandeur for 12 nights out of Harwich on their Baltic cruise. We flew into London the morning of the cruise, and there was little difficulty meeting up with the RCCL folks at the airport and getting our bus to the cruise. We were among the first passengers to arrive, and we were able to board even before noon.
Our cabins (inside for the two teenagers and small suite for mom and dad) were just as advertised. We've sailed before on the Rhapsody, a sister ship of the Grandeur, so everything had a vague familiarity. Our only complaint about our outside cabin was that we smelled far too much smoke from our immediate neighbors. There must be a shared ventilation system, or something. It's a joke that cabins are "non-smoking," as I think that's all that our neighbors did the entire cruise. Likewise, it was sometimes hard to enjoy our wonderful little balcony, since one or both of them were always out there!
Dinner (late seating) was at a table for 10 with some of the nicest people we have ever had the pleasure of cruising with. Our waitress and assistant waiter were the best we have ever had --- her name was Katrina, and she would make recommendations every night on what was and was not "good." If you didn't take her advice, she would bring extra of what she recommended and give it to you instead!