Daniel's is a very nice flat, perfect for a couple and for staying 3 to 4 nights. The bed was very comfy, and the whole place was clean when we arrived. While the bedroom is a bit small, there's lot of space in the living room (so one could easily store their suitcase there instead of having it in the bedroom).
The location is great too, it's in a quiet, residential area (didn't hear any noise at all in the bedroom), but close to Pimlico and Victoria stations, and in walking distance (5 to 10 minutes) to restaurants and shops.
Would definitely book this place again!