We had a really nice stay in the apartment, which is in a great position in Venice. I'd say it was closer to the Rialto bridge than St Marks square, but it's really close to both. The entrance is down an alley, and in a courtyard so might worry some, but everywhere in Venice is down a similar Calle!
The roof terrace is a welcome escape from the madness. We couldn't have been happier with the help from the host.