Me and my girlfriend stayed at Jon and Ella's for a few days, and have nothing but good things to say about them and the accommodation.
The place really felt like a second home after spending a long day getting to know the city and seeing the sights. The room and the private bathroom was tidy, bright, and spacious. Extra credit for the bed! Also the place was within walking distance (5min) from two different London underground stations.
As hosts Jon and Ella were wonderful, kind and welcoming. We saw them mainly during breakfast, and it was really nice to get to know them.
We would definitely recommend Jon and Ella's place!