We stayed 2 nights at Casa Marbella. The room was clean and so was the bathroom. We did a early morning tour with the hotel and this was just perfect. Instead of a motorboat they have a boat with silent electric motor, so we saw more. Also the group is usually small, we were 8 persons. The breakfast afterwards was very good.
In the evening we sat at the riverside and had our beer or snacks there, like everyone else we bought it in the supermarkets in town.
We had a parterre room, very near the river. When the first boats at morning were coming in, we heard the waves and boats very good. So you should ask for a room at first floor.
We were happy with our room, but happier with the tour.