Had a wonderful stay at Sarah's home in London. We were there with our family for our daughter's wedding--she lives in Islington/Angel area and the house was a 15 minute walk to her apartment.
Sarah was an excellent host--extremely responsive to questions prior to our trip and while we were there. Sarah let us check in a little early as we had taken the red eye over to London. Any questions were answered promptly and our needs (more hairdryers) were met quickly. The house was very clean!
There was a well stocked healthy food store (similar to a small Whole Foods) across the street which was handy. We also could arrange for grocery delivery from Sainsbury.
You should be prepared to take your own shampoo/soap/toiletries as they were not provided (Sarah's reasoning is that with allergies, etc, most people bring their own). Additionally, you should know that if you are renting the entire space, the lower level is actually a smaller, separate apartment with two smaller rooms (three beds total), small kitchen space and tiny bathroom and separate shower area.
There is a wonderful rooftop space with chairs/grill/outdoor heater, etc. That was wonderful.