This place is fantastic! Walkable to two tube stops (South Kensington and Sloane Square - Kensington is closer), lots of shopping and restaurants, but still quiet at night. We were able to go everywhere we wanted to go via the tube, and if you tell a cabbie "Chelsea Cloisters" they know where to go. :)
Niki was a fantastic host - the flat was clean and had everything we needed! And if we had any questions she got right back to us.
When I have the chance to come back to London I would stay here again in a second!