If you are looking for a frou frou delux apartment in the ritzy part of town, this may not be for you. But if, on the other hand, you're looking for comfortable accommodation that's spacious, bright, breezy and in a (relatively) tourist free area close to many attractions, Marco and Alice's place is a steal. We stayed in the larger of their two apartments that was a good fit for our family of two adults and two teenagers. They also have an impressive library of guide books, history books and novels in a number of languages. My only caveat is that the apartment is four floors up in a building with no elevator - so some with disabilities might find it a challenge.
As a general note, while Venice is said to be over-run with tourists, they tended to mass around the Rialto bridge and San Marco, leaving the vast majority of museums, churches, shops and restaurants easy and pleasant to visit.