Bill is nothing but a great host! My parents, brother and I stayed at Bill's place for 4 days and we had a fantastic time. The flat is absolutely spotless, very clean and tastefully furbished just like you see in the pictures. The beds were very comfortable and the entire place felt like a home away from home. We got so lucky with the weather that we enjoyed breakfast outside on the spacious roof-deck every day which was simply gorgeous. Bill kept refreshments and apples in the fridge and even put a little welcome note on the door. We never actually met, but he kept in touch via text and was available at all times. Putney is a great base for your trip to London. The tube is literally a 5 minute walk away and takes you straight into the center. There's pubs, grocery stores and cafés right around the corner and the entire area felt very safe and neat. I couldn't imagine a better place to stay during our trip so I highly recommend this little gem in Putney and Bill as a host. You should keep in mind though, that the place has 3 stories and hence a lot of stairs. If that isn't a problem, this is the place for you!