Catherine's room is very spacious, comfortable and airy. It has a very big window that lets the sun in. Bathroom is also big, marvelously clean and overall very nice. It has a very big mirror which is something I often miss.
Room and bathroom are on the top floor so you get all the privacy you need.
Catherine was extremely welcoming and went out of her way to accommodate our stay: she allowed me to do a late (1/2 am) check-in, and offered to keep our bags for us on our check-out day. We were a little cold on our very first night day, as it was a very chilly week in London, but after asking for an extra blanket for the night after Catherine not only provided us with several but also raised the heating a lot in the house and told us we could use an additional heater also if we wished (we didn't need to at all!). Overall we had a great stay and would definitely recommend her house!