Over all we were really happy with our stay here! Mario was super accommodating, happy to help and replied to messages very quickly. The apartment was clean and comfortable. Sadly the street noise can be quite loud, especially now in the summer (and party) season. However I doubt that can be completely avoided when staying in the city. The old windows don't shut completely, so especially at night it can be a bit noisy.
But nevertheless we had a great stay and really enjoyed our time here! The location is fantastic and Mario is a great host!