We had a very enjoyable stay at Anthony's apartment. It was very clean, and appeared exactly as it was listed in the description. The view from the window's in the apartment are amazing, and was a nice surprise that we hadn't expected.
The apartment is in a very convenient location. 15 minute walk from the bus terminal, and 15 minutes to St Mark's square, which was extremely handy for us to get around the city. Despite its great location, the streets are relatively quiet, so there's no need to worry about loud groups of people walking past at early hours in the morning. There are also some extremely nice and reasonably priced restaurants on the street of the apartment, which are worth paying a visit.
In terms of things to visit I won't go into too much detail, but St Marks Basilica, the Campanille Tower in the square, the Doge's Palace, and the Natural History Museum are all well worth seeing. We also took a train from Venice (the station is 15 minutes walk from the apartment, near the bus terminal) to Verona for a day trip. Trains are fairly reasonably priced, so worth a try if visiting the city.
The directions Anthony provided to the apartment were extremely useful, as the city is a bit of a maze, so I am grateful for those. Receiving the key by post in advance of the trip also puts minds at ease prior to travelling. Although the door from the courtyard square into the base level of the apartment block can be a bit sticky, and sometimes required us to reach through the window beside the door to pull the handle from the inside. This wasn't too much of a hassle, and once we had worked out what to do when it stuck it was no problem at all.
Overall I can't recommend this apartment enough. Great host, great price, great location!