I stayed for 2nights at Alesandro's BnB whichwa ideally located 5 mins walk away from Rialto bridge.
Our room was a very nice double room which had everything we needed including a hot tub! Free soft drinks and a fantastic breakfast was also include each morning.
Alessandro was a great host and met us at the water taxi station and gave us som very useful tips of things to see and do whilst visiting the city.
Would highly recommend if visiting.