Stay was great. Everything worked smoothly (check-in, communication, and so on). The apartment is in the perfect location to explore the city, since you have notting hill gate station closeby. The neighborhood is also very upscale and while you're there, don't miss the chance to check out out Portobello Road market.
Now, I don't have a ton of airbnb experience, so maybe my expectations were a bit off. But I feel like I should mention that while some airbnb places feel like you have a private suite at a hotel, staying with Eliot and his girlfriend reminded me more of when I used to share an apartment with roommates. This is in no way meant as criticism, but I think it's important to give other travelers realistic expectations.
Bottomline is that my wife and I would book this place again, if we were to redo the trip. Also, we enjoyed that the kitchen is fully equipped, which is great for people who want to cook their own food.
And another things that may be interesting: There are a couple of electrical plug adapters in the room, so you can plug in USB charges and european appliances.