Wow. A truly excellent experience. Beautiful flat on quiet street next to wonderful park. Within a 1 min walk to one of the hippest parts of London, Camden Town and the Camden Markets.
Easy 5 min walk to the Tube, buses all around. 12 min walk to Primrose Hill, and best views of London. There's even a Whole Foods within walking distance, if you like.
Jack is a wonderful host. Kind, available, quick to communicate.
The flat is homey, relaxed, has every necessity. He even left an extra towel!

I would recommend this flat in a heartbeat for an excellent stay in London.