Rosa Maria's apartment is bright, beautiful, clean, airy, and in a great location. I loved the little balcony. Rosa Maria was very prompt and courteous in communication.
The two flights of interior building stairs up to the apartment are quite narrow and steep. While my Amsterdammer cousin assured me that this is "typical Dutch construction," I found it difficult to navigate the stairs with my mid-size roller suitcase. I'm in good shape, and could hold the banister with one hand and pull my suitcase up with the other, but I had to go step by step and the automatic lights kept turning off on me, leaving me precariously balanced on the steep stairs with a heavy suitcase in the pitch dark. It was not fun. I would not recommended the apartment for people without good balance and strength.
While Rosa Maria's neighborhood is generally quiet, there is a primary school on the same block as Rosa Maria's apartment. For folks visiting Amsterdam to vacation/sight-see, and who plan to be out all day, this should not pose a problem. I was hunkered down in the lovely apartment working for multiple days in a row, however, and the shrill voices of children shouting outside all day during the week became wearing.
The washing machine indications are in Dutch and the dryer indications are in German. I used the camera function on the Google Translate app to figure out which settings to use, which worked well enough.