We just returned home from 8 nights at Clara's wonderful apartment in Notting Hill. Clara is a wonderful host - very quick to respond to all emails, helpful with suggestions, and delightful when she met us on our arrival.
The apartment is perfect for 2 people. It's clean, attractively renovated, and very comfortable. There is no TV, so consider that if TV watching is important to you. However, with all the wonderful things to do in London, it's hardly a problem. The location is perfect - about 3 minutes from the Notting Hill tube stop, which quickly will take you anywhere you want to go in the city.
All conveniences - restaurants, shops, coffee shops, terrific pastry shops, supermarkets, banks, as well as beautiful Kensington Park are within a few minutes walk. Clara's apartment is on the ground floor, so there are no steps to climb. Although on street level, it is very quiet, as this is a beautiful residential street. I can't imagine a better place to stay in London.