Ugo's place is perfectly located for Venice. It's tucked away from the very populated tourist areas around San Marco which really added to the feeling of living like a local. In saying that, Venice is compact enough that you are only ever a 15 minute walk from most major attractions.
The flat is right around the corner from lively campo santa margherita and it can get a little bit noisy on the weekend. I'd bear that in mind if you're a light sleeper but really, it's minimal.
Ugo makes wonderful recommendations for restaurants in the San Barnaba area. You'll never have a bad meal if you follow his guidance.
Overall a fantastic stay and I would definitely return if I'm ever lucky enough to return to Venice!