We stayed for two nights at Alison's place while visiting London and seeing the sights, and had a fabulous time. The place is quiet with a comfortable bed and shower across the hall as described, though I thought it was much more spacious and comfortable in real life as compared to the photos. The whole apartment is very clean, and Alison was kind enough to invite us to use the common room and kitchen, though we didn't get a chance to during our short stay. The location is particularly great, as Big Ben and the major sights are generally a 10-20 minute walk up the road, which worked really well for us. We ended up heading out all day to play tourist, and the place was perfect for that purpose.
Alison herself is incredibly lovely, and communicated directions to us in advance, and then met us at the door when we arrived. She made us feel very welcome, but also left us to our privacy during our stay. I would strongly recommend this listing for any visitors to the city, especially those who want to see the big sights nearby!