I had a good experience staying with Alia who is the host. Though she is very busy and I didn't see her much during my month long stay, she was always super cheerful and easy going.
My room was just as advertised, spacious for central london! Good storage and I had space to hang my clothes up. Bed was very comfortable.
The apartment is on the top floor, which was great to get some exercise for me but people with mobility issues should be aware. Also it is a busy area so traffic noise and sirens are audible, light sleepers might have trouble.
The location is the biggest winner as I could walk to almost everything. I almost did not use any public transportation during my stay as it was about 10~15 minutes to all the things I could've wanted. It's useful to be on the Central line too if you were going further out of the city. Buses are on the door step.
Great host, perfect location!