There were bad and good stuff of this Airbnb experience.
Good ones: The flat is located really close to piazza San Marco and the host welcomed us friendly.
Bad ones: the flat is at a high floor without the lift. The room and the house weren't cleaned so good. Bathroom is to share not just with the host but with other guests also. There's no a real breakfast room and breakfast itself was poor with just milk, coffè and one pre-packed brioche. Wifi was broken so we couldn't use it.
In any case If you are adaptable person and wants to save money I think it could be fine here ( not for long stays cause there is no a wardrobe).