Just returned from a 3 night break at Ca' del Pozzo. Totally agree with the comments from Plepper, Portland. Told to ring the B & B for someone to meet us - phone number unobtainable. Managed to find the vicinity of the B & B with maps but had to ask several locals for the exact location (down the dark alleyway).
Had to climb the 58 steps to the 3rd floor - no offer of help with the luggage from the man who let us in but he didn't waste any time in asking for the 10 Euros for the extra needed for arriving after 6 pm!
The room was large, well furnished and very clean. The bathroom was the same but still no water pressure! No chance of a shower and took 20 minutes to run a few inches of water in the bath! Breakfast delivered to the room - very poor. Still no mention of the free boat ride to Murano.
The location is really good - walking distance to St Mark's Square.