I'm very happy with this spot. It's a nice, quick walk to the shops and restaurants in Chelsea, the shops and restaurants in Kensington, and to public transport. There's a bus stop right around the corner and a tube stop a very nice 15 minutes walk away (which also has a Big Bus London stop if that's your thing).
The neighborhood is quiet and peaceful. You will feel safe in and around the AirBNB.
The apartment is very clean. The space is small, but it was just fine for the two of us. The unit being a 4th-floor walkup was totally fine with us as well; we liked the extra bit of exercise!
The host was very responsive and friendly. Check-in instructions are clear and easy.
Just an FYI: there is no washer in the unit, as indicated on the listing. This might just be a mistake with the listing.
Thank you, Kaz!