Marco was friendly, chek-in was good and quick, the flat is very large and very well located, the beds are soft and good. You have to upload your ID to AirBnB to get the flat.
The flat is very dark and damp and smells very damp. There is no daylight - if you open the cross-barred windows there is an corridor or something - so dark, you can't see what it is. I don't think the flat gets cleaned very regularly, the bathroom is small and there is a black scum arround the shower. It was our 6th time in Venice - we've seen much better places. We would not stay there again.