I loved this cruise. Stayed in a studio room on deck 11. Had a hard time finding the room on day 1. There is a door that says "Studio Lounge". Enter there with your key card to get to the rooms. (I was looking for my room number among the other rooms on the main corridor.) Some noise, but not excessive and I had no problem sleeping. As a single F 65 y.o., I loved the room. The room attendant was very responsive, kind and asked about my well being often. The studio lounge accomodates decks 10 and 11 for studio room occupants. There is a special calendar of events for single travelers which is very nice and an activities director to assist. (Most folks I saw were in there 50's and 60's). Free coffee, tea, juice, fruit, cookies and pastries 24/7 in the Lounge.
Extra $ restaurant: Went to Moderno which was fantastic. Over the top salad bar and if you are a meat eater, you'll love this.
I'll go again. Loved the overall experience.
Loved the cabin. Very compact, but fine for one person.