A lovely little place, very comfortable, peaceful and suited me fine.
The steps to and from the 4th floor were fine for me, and very clearly communicated upfront, and whenever I had a question, someone responded very quickly, clearly and resolved my queries without issue.
The apartment was exactly as described, very close to Notting Hill Gate tube station, and there are plenty of restaurant and supermarkets to cater for most needs, I'd say.
All in all, a really good couple of nights, thank you :)