What a lovely apartment, and very large. My wife and a friend stayed at Mossimo's apartment for a few days and thoroughly enjoyed it. Its off the beaten path which is exactly what we wanted. As you know Venice is overrun with tourists (we count ourselves in the problem) so it was nice to leave the main area and head back to a quiet part of town in the evening. Its in the Cannaregio area and you will find many locals in the area and none of the tourists traps.
The flat was very nice and well appointed. Mossimo was quick to answer any questions we had and was very helpful in suggesting places to eat and what to look for. He also gave us a wonderful boat ride around the area that was much better than we would have gotten from a gondola. As a native he knew the area, its history and was candid with his feeling about Venice and how its has changed over the years.
I definitely recommend his flat for your next visit to Venice and I will absolutely contact him when we return.