Suggest you try reading the all the reviews on tripadvisor dot com. Personally stayed at Antiche Figure and was very happy with price and location.
Hello there,yes I would concur with Mr Aldrich it is well worth checking trip advisor. We stayed at Al Ponte Mocenigo which was fabulous but very reasonable- no 1 on trip advisor about 10 minutes stroll from the Rialto bridge. We booked direct with the hotel via the internet & they were extremely helpful in every respect.
We stayed in the Bonvecchiati it is just behind st macrs square for 3 nigfhts last year before we joyned are cruise the hotel was great.