There is occasional smoking in the kitchen and the dining room!! (With open windows but the house still smells of cigarettes). I unfortunately didn't know about that before I arrived.
Maire is a really kind and caring person who will do her best to make you feel at home (including showing you around in Acton) even though I personally found she was a bit messy around the house and my expectations about the cleanliness in the kitchen weren't quite met. The counter was always full with stuff which people just left sitting there (opened food items, dirty or clean dishes...everything) and on top of that bread crumbs and cigarette ashes were just left on the table and the kitchen counter. The cleaner that comes weekly did a great job though.
Despite the downstairs area, I had a lovely room. My desk was new and good to work at. The bed was a bit worn out but I still slept okay. Only the drawers of the nightstand weren't totally clean. The rest was all clean.
The two bathrooms were clean enough.
Depending on your personal standards and expectations I would recommend Maire as a host.