James is an excellent host, who responded immediately to all my questions prior to arrival and who was very accommodating in every way.
The flat is in a perfect location for sightseeing, as many attractions are within a 15 minute walk. This allows for short trips throughout the day and the ability to stop back by the flat for a short break in between. The downside of being so centrally located is that you are in a busy part of London with a fair amount of noise at night. As long as you are aware of that fact heading into the rental, I don't think it's a problem and we slept very well each night.
The flat is set up well for a family of 4. We were certainly more comfortable than we would have been in a small hotel room, and it was nice to have some space to relax at the end of the day. There are a few no I or issues that hopefully James will correct in the near future. The bathroom is in need of updating, but is certainly serviceable. Also, there is a some clutter around the flat that makes it feel smaller than its square footage (several tvs not in use in the corner, a file cabinet in the living room, etc), and there is essentially no closet space or drawer space to unpack.
I would definitely rent this flat again given how centrally it is located, but it will likely need some of the updates above to warrant the rental fee. James is an excellent host and I would recommend him without any reservations.