I rented Maria's place on behalf of two clients for a 9 week stay this summer, and it was by far the most difficult listing I have ever booked.
We rented the whole space, but it was extremely unclean when we arrived, despite the host assuring us she would clean it before the clients arrived. She then recommended a cleaner to us, who we paid with our own money, but who did not actually clean. There was hair everywhere and the bedsheets were stained and crumpled, and some of the crockery inside the cupboards was grimy. There was food and syringes (for medicine - not drugs) left in the fridge, which nonetheless made the clients feel uncomfortable. There were bugs in the kitchen which after extensive communication the host finally addressed.
Communication with the host was slow and difficult, and I had to ask her to stop contacting my clients directly as some of the messages she sent were unnerving and made them uncomfortable - such as needing to hide away valuables when the cleaner (which she recommended) came around, because she was likely to take things. We did not work with that cleaner, and instead worked with one of our own, who is incredibly trustworthy and who we paid out of our own pockets to make the place decent for living in.
The host also came into the flat several times without prior warning and rooted through the cupboards for something she had left behind - making my clients feel very unnerved and like they could not really relax in the space, which was unfair on them. One in particular ended up very distressed about it, and I had to explicitly ask the host not to enter the apartment without forewarning - she did not seem to understand in the slightest why it was unnerving for my clients to come home to open drawers and cupboards which had clearly been searched through.
I am generally pretty easygoing about airbnbs, but renting this apartment was a stressful situation for all involved and I really would not recommend it to anyone.