Short version: if this place meets your needs for size and neighborhood, BOOK IT RIGHT NOW. Otherwise someone else will take it and you'll never know what a wonderful flat you missed.
Longer version: we are a family of four, with two daughters (ages 9 and 12), who stayed here for a week in April. Kim met us on our arrival (and was kind enough to work out the cleaning schedule so we could check in a bit earlier than planned). He described his and Trish’s ambition as to create an experience that incorporated some elements of a five-star hotel (e.g. toiletries provided, top-notch furnishings and such) along with the comfort of a flat (kitchen already stocked when we arrived with basics and snacks, fruit, and more). At that they succeed. If you imagine being ridiculously rich and having your own apartment in every city you visit, stocked with what you need, this is as close as you’re going to get. Short of having my clothes already hanging in the closet, there’s nothing they could have done to make us more comfortable.
The location is great — 10 to 15 minute walk to Earls Court tube stop, and easy access to the rest of the city from there. The street is quiet and since all the bedrooms are in the back, we had zero problem with any street noise.
The flat itself is very comfortable, with our girls liking the two smaller bedrooms and my wife and I very comfortable in the rear master bedroom. The kitchen and bathrooms are modern and spotless and I don’t think anyone would find anything to dislike about them.
Kim gave us a through briefing on the flat, the neighborhood, and suggestions of things to do in London. The flat comes with books of maps and suggestions (Tube, bus lines, restaurants, and more) and Kim spent the time to orient us on the major items and lots of smaller suggestions. Nothing is complicated, but it was good to know exactly how to use the washer/dryer, the dishwasher, all the lights, etc.
I could go on but that should give you the idea. It’s a great flat with absolutely wonderful hosts and we recommend it without reservation. We’ll stay there again if our travels bring us back to London.