We stayed at Chiaras rooftop apartment from 2-6pril 2014. We had lovely comfy stay. Its easy to get around walking or by water bus the vaporetta..the apartment is well equipped and there are several useful shops wher u can buy most things. Including a bakery, a deli with great cheeses etc, wonderful greengrocers and a fishmonger who will clean the fresh fish for you, also a small supermarket where u can buy wines etc.
The district of castello is very nice, friendly people, not too touristy, few nice bars and restaurants. We had a great stay.