Luca's apartment is well located in the center of Venice, walking distance to water bus station and almost the majority of the well known places.
The price is quite decent comparing to the options you have, while Luca himself, always open to provide assistance and his local point of view through strong recommendations.
Venice is amazing, yet expensive. Luca's apartment is clean, warm and a true value for money. I would definitely recommend a short stay at his place.