We had a fantastic time at Natasha and Trevor's place. We stayed here for a few weeks when we moved to England from America, and needed a home base while we searched for a long-term apartment.
Because we were there with our infant daughter, their prompt responses were especially useful; from tips on grocery shopping to answering questions about appliances, they always got back to us right away.
We highly recommend their beautiful home, its location can't be beat as it's quite close to public transportation. And also Kensington Gardens and the museums.