I stayed at Kim's beautiful place for a full month, the longest I've ever stayed at an Airbnb, and it was the most wonderful experience. You won't find this combination of location, stately elegance, walkability to EVERYTHING (West End shows, tons of beautiful parks and great restaurants, and the British museum at your damn doorstep), and homeyness (books, DVDs, a well-stocked kitchen...even a closet with stuffed animals in it, that my son deemed "the magic closet") anywhere else.
Kim is an amazing person -- so kind and warm, easy to talk with, generous and helpful -- I feel so hugely lucky to have gotten to stay at her place. If it's available and you're considering it: BOOK IT. I hope we're able to return sometime.