I've been in Mary's place for three weeks and it's been very good. The place is as shown in the photos, with a good size kitchen and bathroom, with everything working. The room is small but comfortable, with a comfortable bed. Besides that, this is probably the most quiet place I've been in London (and I've been in many). If you need silence for a good rest after a busy day, this is the place.
Besides, Mary is a fantastic host, ready to help if you need it but giving you the privacy and the space you want, without complicated rules. Highly recommended!