Coming to Umberto & Martha's apartment by vaporetto, down the Grand Canal has to be the highlight of any trip to Italy! The location is fantastic, an easy walk to St Mark's (just follow the sign posts) and nice and central wherever you find yourself in the evenings.
We came in July 2019 - heatwave records broken across Europe - and the apartment was too hot for us. There is a ceiling fan, but it's very noisy, and the pillows and towels provided didn't smell very fresh. It spoiled our trip, but I hope can easily be resolved for future guests to make this the 5* experience it should be.