We (two friends/colleagues) stayed at Licia and Paolo's apartment for six weeks while working on an opera at La Fenice. Every night we were so happy to leave the craziness of the center behind and come home to our cosy refuge in Castello - a world away and yet only a 17-minute walk from the theater. On our days off we often avoided the center entirely and wandered over to Arsenale (just next door), i Giardini, Via Garibaldi... The location truly could not have been better!
The apartment itself is very comfortable, unique, charming... perfect for rainy nights and for sunny mornings... it really felt like home. Everything we needed was provided, and Licia and Paolo were extremely welcoming, helpful, and attentive to our every need. (They are kind and interesting people whom I would love to meet regardless of any transaction!)
The only major problem we encountered was with the shower, but I believe that this will already be taken care of by the time the next guests come in. (After many attempted interventions by various technicians, it was concluded that the whole system needed to be replaced, but my understanding is that they will do this immediately- they even offered to have the work done near the end of our stay, but as we were leaving soon and were able to shower in the theater, we declined.)
Heartily recommended.