This is one of the most beautiful places I stayed at in London. The house is charming, warm and full of little lovely details. Rooms are spacious, there is plenty of place to put clothes and other stuff in, and everything was spotlessly clean.
Becs is a wonderful host: she couldn't be there when we arrived, but she provided excellent indications to let ourselves in and chatted with us to provide every possible information. She even checked on me when I wasn't feeling well <3
The neighbourhood isn't exactly in the heart of the city, but the tube station is less than 5 minutes walk and nearby you can find everything you need (supermarkets, restaurants, shops etc.).
I absolutely recommend Bec's apartment, and I hope I'll be able to stay at hers again in the future (maybe in the good season, so I can make the most of the adorable terrace surrounded by trees!).