My girlfriend and I visited this listing and we were just 100% satisfied.
1. The room was really clean
2. The location was just perfect, we could go almost everywhere really easily and fast. Central Station is like 15min on foot. Cube houses are maybe 20min and Maritime Museum is also like 15min. The famous Jizzy Bar (a must-visit) is also just around the corner (2min). You also have many bakeries to either buy your breakfast or places to have your brunch. Tram stations are also like 2min walk. If you want to explore the city, the location is ideal.
3. The hosts were really friendly, mindful, and helpful
4. The room was really nice, big bed, big shower, warm, and we were amazed by the interior design
5. Be mindful that you'll have to climb some stairs. So unless you have problems climbing some stairs (you shouldn't), the listing is just perfect for two people (or one) who want to enjoy Rotterdam. The hosts are friendly enough to help you with your luggage on the stairs if you need it.
6. In case of questions, the hosts always answered us really fast. They were always friendly with us and gave us some helpful advice.
In general, we really enjoyed our stay and we would definitely recommend it.