We've stayed in Venice for a week in Antonio's apartment.
Good things:
Luca, the person who welcomed us, was very kind and explained everything in detail. Also he offered himself for any inconvenience that could occur, which fortunately didn't happen.
There's WI-FI! Don't expect a fast connection to work with but you can take a look at your email.
The place is well located, 20 minutes either walking or vaporetto from San Marco but away from the tourists circuits and very quiet.
The place is really charming.
The price is very good for Venice.
Not too good:
No air conditioning. Although you can open the windows, not always there's fresh air and mosquitos come in quickly! This is my third time in Venice and I'd never thought about air conditioning, but take it in consideration if you travel there from june to september.
No lift. I like walking upstairs and downstairs but if you don't look for another place.
The bath wasn't comfortable at all, specially the bathtube to go in and out.