Great location in a very quiet cul-de-sac, just moments away from the hustle and bustle of the famous Portobello road, and the open spaces of Hyde Park and Kensington Gardens ( think Kate and William). Good local restaurants just around the corner and grocery stores just nearby along with a wonderful Italian deli. No need for a car, the public transport is just there, underground ( 4 stations a few minutes walk) and buses.
Super clean and Sophie is a very attentive host, would definitely stay again on my next London visit.