South Kensington location is fantastic -- close to bus and tube stops, Harrods, Hyde Park and museums. Beyond location, was not overly impressed with our experience.

We arrived for a 10-day stay to be told that the washing machine was broken. Property manager said it "stopped working while the previous tenant was in there" and they were "in the process of changing it." However, in reading past reviews, seems like it's been broken for a while. Did not hear back from the manager for four days about a replacement despite daily requests. Finally had to haul luggage full of laundry to a laundrymat.
When asked about location of dishwashing soap, the response was "sorry it is probably finished. You can get done in the local store, it's very cheap)."
Overall, I found the host not to be very communicative, nor concerned or apologetic about the issues with the flat. This was a major investment on our part and we felt dismissed with zero level of service or care. Words of caution for others looking to book this flat or with this host.