I and my friend stayed three days at Louis' apartment and I strongly recommend it!
The house is in a nice and quiet block which only takes about 10 min to the subway station and for girls, you would feel safe even returning late at night. The bedroom is clean, with our own bathroom attached and washing room aside stairway. The kitchen and living room are accessible.
Louis is very warm-hearted and patient that he gave us very detailed introduction and suggestions about traveling around. Thank you for making my first trip in London even better:)