Caecilia was very sweet and also very flexible. The room is great value for the money - spacious, the bed was big enough (I'm 182 cm tall). Both the bathroom and the bedroom were clean and tidy, there was enough hot water. The WiFi was also fast and reliable.
There are 2 train stations nearby, both are in zone 4. It's walking distance: Selhurst is about 8-10 minutes away on foot, Norwood Junction is about 15-18 minutes. There are some trains after midnight as well. From the stations, there are fast and slower trains as well. They all go to London Bridge or Victoria. The faster trains are there in about 13 minutes, the slower ones maybe half an hour. The neighbourhood is safe and quiet. Overall, I really recommend Caecilia's house, I'm glad I found it!