We´ve stayed at Winnies apartment for 4 nights and we liked it a lot.
It is a lot bigger than it seems on the pictures. It is situated in a nice neighbourhood and it only takes a 15 min train to get into London. Unfortunately we didn´t meet Winnie, but she is very friendly and helpful due to our conversations. She always responded promptly to my messages. I also liked how she furnished her apartment. It is clean and tidy.
When I come back to London I would definitely stay at her place again.