We had a very nice stay at Luisa and Matteo apartment. It is located in a very nice area, not touristy, close to local shops and nice bars, 15min walk from Biennale giardini, 20min walk from San Marco, 5min from Rialto bridge. The street is very calm. The apartment was simple and convenient : entrance with a small kitchen, a bathroom with shower and main room with a double bed, equipped with air conditioning, 2 windows whit shutters on the courtyard. The place has been renovated recently, it is super clean.
We definitely recommend to stay at their place if you are looking for an easy and friendly place to visit venice.