I stayed in Marco's place with my fiance, my dad, and my stepmom at the end of September and we absolutely loved his place. It was the perfect size, beautifully clean, and in a great location. We could get to Rialto in 5-10 min, San Marco in 20, and it was an easy walk from the vaporetto. It was perfect for coming home to rest before dinner! Marco was also great in that he met us at the vaporetto when we arrived to show us in. We arrived before check in while it was being cleaned but he let us store our bags in the apartment and gave us a map with local sights and some restaurant recommendations. We ate at a few and they were incredible.
My only complaint was that there was a fair amount of noise coming in from the neighbors particularly in the morning. It's in a residential area so the locals are up earlier than we were and the walls were thin enough to hear them above and next to us. Not a major concern by any means but something to keep in mind for late sleepers out there!