Our 23 year old granddaughter accompanied us on our Harmony Cruise. We had a CLS. You will love it! The sofa bed was very large , seemed like a queen sized mattress. She was very comfortable. Had great pillows, you can request the type, and the bed was made into a couch in the morning and into a bed at night. She had tons of storage, her own full bathroom and TV. Although she was on her phone mostly! You are in for a real treat. The best location on the ship IMO.
Enjoy your cruise.