This flat is clean, spacious, and overall excellent for families traveling to London. It is 10 minutes walk to the Fulham Broadway station on the District Line tube, which takes you all over the city.
Since Fulham is a residential area (vs. tourist area), there is a wide selection of non-chain restaurants and grocery stores, so you can easily cook in the well-equipped kitchen, or eat out, or if you're too tired after a long day of sightseeing, you can have meals quickly brought right to the door (using the Deliveroo app there were dozens of options).
All 3 bedrooms were good-sized, with comfortable beds. Our son (age 10) slept on the pull-out sofa bed in the 3rd bedroom and was fine. 2 adults might not find it quite as comfy, but the other 2 beds were extremely comfortable. Having 2 bathrooms was also a bonus, as we were all able to get ready in the mornings at the same time.
Probably the best feature of this flat is the back garden, which has a table with 4 chairs. The weather was lovely when we visited (mid-July), and we ate out here most days. It's great to be in a big city, but still be able to enjoy the outdoors and a "neighborhood" feel.
Wait... maybe the best feature is the neighbor, Beatrix, who facilitated our stay. She and her husband are super friendly and very responsive to all questions. They had great suggestions about where to go in the neighborhood. Their cat, Charlie, visited the back garden most mornings, and we had fun "Charlie-spotting."
In summary: a great place to stay in London, especially if you're traveling with family and want space to spread out and relax while still having convenient transportation to all the London sights.