First big problem was that the flat is advertised as 2 beds and 2 bedrooms when it is actually one bedroom and one pull out couch in the living room (from the real bedroom you have to walk through the living room to get to the kitchen/bathroom, so it's really not its own bedroom).
In addition, the A/C is only in the bedroom. Even if you leave the door open (which again destroys the point of having 2 bedrooms), the A/C doesn't really circulate, and there are no fans to assist.
Clean sheets were provided for the pull out couch, but the blanket was possibly the grossest thing I've encountered in any Airbnb. It had...organic stains on BOTH sides and smelled like it had never been washed. We brought this up to the management and they basically told us we were lying - "everything is clean." The place was also mosquito infested, and we were bitten all night during our stay. We asked management for a mosquito net or trap and they responded that "mosquitos are a part of life in Venice. Keep the windows closed." So no air con, no fan, and keep the windows closed...we ended up sleeping naked and covering ourselves with bug spray. (I also think the mosquitos in the apt had predated our arrival, since there were at least 6 at night and we'd only left the windows open during the afternoon for 10 mins upon arrival.)
Host, whose name is just "Venice," was rude in most correspondences. Earlier reviews had fond comments on the host - I think the management has been farmed to a company, although we did get one final email from Nicola at the end. We also stayed Sept 2018 and paid $206/night. Now I see it's going for $116, so maybe management figured the services they are offering are only worth half.
Keep the bathroom door closed because the sewage smells can fill the whole house (this may be a Venice thing, given how sewers and canals work).
The "welcoming breakfast" was never found but we were told after we left where to find it: "inside the glass vase in the living room there are four croissants." I'm sorry, you have a KITCHEN, but you left croissants inside a VASE in the LIVING ROOM? That is extremely bizarre and anyway we couldn't confirm because we'd already left.
Other than that, everything was fine.