The flat is as described at Airbnb. One spacious room with a comfy bed. The kitchen is quite small but it features everything you might need for preparing a breakfast. Bathroom is rather large and fine as well.
The location is very nice. There is a Starbucks and a supermarket right across the street. Kings Road with its cafes and shops is only a 5 minute walk away, the tube stops at South Kensington, which takes just 10 minutes to reach by foot. Chelsea is also a very nice and safe neighborhood.
We didn't meet Pippa in person, but she reacted very quickly to all questions before and during the trip. Keys were provided by the 24/7-porter of the building, who can also be asked if you have question.
After all, a very nice flat for your stay in London.