This apartment provided us acceptable accommodations for our 3 night stay in London. It's located about a 20 minute walk from Westminster/Big Ben and 30-40 from some other attractions (Picadilly Circus, Buckingham Palace), and also just a short walk from the Kennington metro, which was very easy to use with the Oyster Card that Paul recommended. The apartment wasn't as clean as we would like, but it worked for us as a place to sleep after long days sightseeing.