The hotel itself is quite clean and and modern.
My partner and I stayed here for three nights and found our stay to be quite relaxing, with a nice range for breakfast.
Its about 20 minutes walk to get to the heart of venice, the walk during the day is beautiful with with wonderful views and parks.
The only downside would be walking back at night, as the area around the hotel is not well illuminated and seem too quite when leaving the busy st marco square.
However if you are catching a water taxi back to the hotel this wouldn't really be a problem as the stop is only a two/three minute walk from the hotel.