Response from Alessandro:
Dear Alex, I do think that is review is really unfair. You know that I was very clean and left the room in perfect conditions. Btw, I do have pics of everything and I am going to contact the Air BnB staff to prove what I say. About the discount, well I had paid 50 pounds per night in low season (after your discount!) for a basement room... Is that cheap?? Fortunately I spent my last night at "Earls Court Ibis Hotel" in an amazing and bright room and paid just 65 pounds!