I stayed here with my girlfriend for 3 weeks in December during Christmas holidays, and enjoyed my stay very much! John is an amazing host, kind and really helpful and a great cook too!
The apartment is very tastefully decorated down to the smallest detail, well equipped, clean, uncluttered and comfortable. It's really well located, with central buses going right by, and underground stations within a short walk. The Victoria-line and the Piccadilly-line tube are very convenient for easy access to all the central destinations.
The room is big and quiet, overlooking a park and with a private bathroom just on the next door.
I definitely recommend John's house.