For me, personally, the host was more important than the house, but at Matthew's, I had a combination of both, a kind host and a good house.

Matthew is a very kind and helpful man. He made us feel absolutely home. He also saved us some good pounds by giving us helpful tips :)
The house is clean and neat; It's also very close to the underground and bus stations; from there you can start your cultural walking tour, and If you're into shopping, you can take a 20 minutes bus ride to Oxford street where you'll find all the exclusive shops.

I would definitely stay there when I come back to London!