Our stay in London was fantastic. The Airbnb is in a great location. Pimlico is a quiet area at night but about a 20min walk away from the action plus the center of the city is easily accessible by bus and/or train. The apartment was clean and costly, just a couple things to note:
1. It’s not easily handicap accessible as it’s on a lower level with some narrow stairs
2. It is a shared space, with quite thin walls. You still have plenty of privacy with a private bathroom but think more of a hostel or hotel feel where you can hear other people walking around or talking in the kitchen. Wasn’t a problem for us and all of our “flat mates” were very polite but just in case you’re a light sleeper!