We stayed at Barbara's Kensington studio twice ... for 4 days at the beginning of a 2 month holiday and 3 days at the end. We felt very much at home. The studio itself is lovely with everything you need and yes, a very large, very comfortable bed. It is located on the lower ground floor of a beautiful home on a quiet, yet perfectly located, residential street. An excellent local pub, the Builders Arms, is only a few doors away, and there are several good restaurants & coffee houses within a block or two (still within the residential area). Venturing 2-3 blocks away in either direction gets you to the bustling commercial zones of Kensington, with loads of restaurants, shops, pubs and excellent transport connections (both the High Street Kensington and Gloucester Road tube stations).
Barbara is an excellent host. She's super responsive, yet very respectful of your privacy. And it's very easy to get to the studio from Heathrow via Uber. Would love to return some day.