We really liked the Supernova Hotel, which is a quirky boutique hotel in a nice location. Rotterdam is quite manageable, so the location of this hotel was very good. We had booked a family room, which included a loft with an additional queen bed. This was exactly as depicted in the room description.
There was a very nice sitting area in the room, and a door out to a garden area that we really liked. It is a quiet property, at least when we were there, and the front desk was very helpful. You can easily walk everywhere. Overall, we really enjoyed this hotel and would highly recommend it.