Concierge Class staterooms feature floor to ceiling sliding glass doors, a sitting area with sofa, two beds convertible to queen, vanity, bath with shower and Hansgrohe shower head, television, and a veranda.
Our stateroom was located on the Resort Deck, on the hump. The balcony is larger than the standard and we loved it. I was concerned that our cabin was next to the stewards cleaning supply room, but the benefits outweighed the con in the end. It could get noisy when they started their day, but that's it. Our cabin was one of the first cleaned and we had easy access to our stewards. There was never a problem getting a hold of them. Storage is limited, so I would recommend bringing collapsible hanging storage for the closet, worked perfectly.
C2, 2169, a hump cabin on the resort deck which corresponds to 2105 on the other Solstice class ships. We had previously enjoyed the extended balcony this cabin offers. This cruise, we heard flushing from the ladies room toilets directly overhead MUCH more, which sound like a cannon shot each flush. We did not hear this inside the cabin, but for eating breakfast or hors d'ouvres the sound was annoying. Read entire member review.