Maasdam was a good size for a first time cruiser. Enough choices for restaurants and lounges without being crowded. If I remember, the quoted number aboard was around 1160. Stateroom I-029 on Navigation Deck has more than enough space for a solo traveler.
Crow's Nest was my favourite afternoon hangout, especially as we left port. Evenings were about dining and the showroom. I tried Caneletto and Pinnacle Grill, plus Le Cirque, with Pinnacle being on my future must-do. But the Rotterdam main dining room was my favourite because as a solo, I sat with a mix of new and repeat guests each evening at different tables.
Stateroom I-029 on Navigation Deck has more than enough space for a solo traveler. No troubles with the room equipment. Water, lights, toilet all worked fine. Neptune Lounge located just next door was quiet.