Great host (communications, flexibility, accomodations).
Apartment is not big, but you wouldn't stay much inside anyway...
Top floor with narrow stairs - be prepaired to sweat why hauling your suicases up and down...there is no elevator!
Can't beat the location. Vaporetto stop is a few steps away. The longest walk is about 20 minutes is to the train station (you don't want to walk there with your suitcases!!!).
Oh yeah...And Venice is beautiful (as ever)