We were met by Geremia at the Rialto vapporeto no. 1 stop and he explained everything we needed to know. I have never had such a great Airbnb host.
Now about the apartment: great location. Close to the Rialto bridge and 7 to9 minutes from St Marcos square. The place has everything we needed. Good heater, good hot water (although the shower is quite small). The mattress was excellent. One of the best things was the fast WIFI. This was our 4th Airbnb in Italy during this trip and the only one that worked properly.
One item to note: if you have trouble with stairs, this place is on the first floor (read 2nd floor if you are from USA). And it is steep but doable.
Follow Geremia's instructions as to where to go eat and visit and you will have a great time