We stayed for two nights and had a great experience overall. Check-in was the easiest of the entire trip. The host just gave us a code and the address and we let ourselves in on our schedule. Checkout was just as simple. The apartment was clean and charming and met my expectations based on the picture. It was very centrally located, but far enough away from St. Marks Square that you didn't feel like you were living in a tourist trap (though the walkway outside did get very busy at times). Overall, this was one of the best locations we stayed during our time in Italy.