Terrible odor of cigarette smoke in the flat. I notified the host when we checked-in, but all I received was an apology. Nothing was done to further clean the flat. I Spent the first part of my stay trying to air things out and remove the odor without much success. If I had known about the smoke smell I would have never booked this flat in the first place and would have made other arrangements as I have a terrible allergy. I was not happy with the host's response to the issue.