Kate's place is located within a few minute's walk to an Underground station, especially convenient for getting to and from Heathrow, and easy enough access the London sights. There's a local Sainsbury a hundred yards from the tube station, on the way to Kate's place, where we stopped each night for provisions.
The price was reasonable enough so that we rented the rooms for our entire stay, leaving most of our stuff at "home base" while we wandered up North for a few days. It was good to have a familiar place to return to, after venturing away from London.
Kate was quick to respond to our needs and was gracious when we lost our house key amongst our baggage, returning from a jaunt to Cambridgeshire.
We highly recommend Kate's place and will happily return on our next trip to London.