I stayed at Hannah's for two weeks. Everything was perfect, from easy check-in to every thing else. Everything was clean and uncluttered. Toast, jam and tea was there always for early breakfast. Bed was comfortable, and there is enough storage space in the room. The mattress on bed was quite soft, so after whole day at the lab, it was nice and relaxing. Building is quiet, and even though the rail-tracks are really close, it is quiet enough during the night for a good sleep. The flat is some 6-7min walk from Richmond train station and 15min from Kew.
Hanna is a super host, with lots of interesting suggestion for sightseeing. She is quiet as a church mouse - off to work early in the morning, and when home you can barely tell she is there.