Definitely one of the best places to stay in London! Perfect location and great neighbourhood. Flat is warm, sunny, bright, cozy and very inspirational. I can say that Fer is the best host I know - always takes care and is very responsive to any inquiries and questions. You will be looked after very well.
If you are not in love with London yet - then staying in Notting Hill will definitely change it and you will come back again and again :)