Warren's place is fantastic! He was there to greet us when we arrived late in the evening and provided some provisions for breakfast the next day, which we welcomed. The flat was clean and quite spacious. There are three of us and it easily could have slept five. It's between two tube stations but Westbourne Grove is slightly closer than Notting Hill Gate.
The area is quiet but only a few streets away from the bustling Portobello rd. I would definitely stay here again.