We had a very reasonable experience staying at the Ca'Venere Apartments. We were greeted at the apartment upon arrival and the amenities were all available. The only disappointing issue was that the wifi was very spotty on the night of our stay (we could only connect for a short while before it would cut out). It was fine by morning, so it was probably a temporary issue. Aside from that, the location was great for commuting by train (10 minute walk from Santa Lucia) and you are a short walk from many of the sights around Venice!