Alistair's house is a great place to stay in London, warmly recommended, particularly for a family with kids, or even 2 families with up to 2 kids.
Located in a quiet neighborhood, the house is modern, fully equipped (except for a microwave maybe. Liked the USB wall sockets!) and spacious (3 bedrooms, one with attached bathroom + 2 bathrooms + toilet downstairs).
The back yard garden is small but lovely and features a trampoline and a barbecue.
Most notably it's a house regularly used for living, so comfort is maximal, definitely beyond other places we've stayed in.
House was certainly clean and ready for us, no issues whatsoever. The house manual was clear and useful.
Though not in central London (that's not a bad thing if you're looking for a quiet place to stay as we were), it's about 5 minutes walk from a Tube/Overground station that can get you to Piccadilly Circus/Trafalgar square or Camden town within less than 30 minutes.
A local supermarket and other shops are also 5 minutes walk away.
Though I didn't meet Alistair and his family in person, we easily communicated with the chat and he assisted with everything we needed.
Again, warmly recommended.