I loved my stay at Stefano's place. The location and the price simply cannot be beaten! The room is cozy, quiet, and very clean. There are a fair amount of steps, so as other guests previously mentioned, this may not be an option for someone who is differently abled or cannot carry their luggage up a few flights of stairs.
As for location, the apartment is centrally located and I felt fairly safe walking to and from the location at night by myself. Finally, a nice added touch was the breakfast in bed.
When checking-in, note that Google Maps and Apple Maps may send you to the wrong location. If I'm ever back in Venice, I'll definitely look to stay with Stefano again :)