We were looking for a short stay to visit London for one day with our six year old son and the appartement was fine for that. We could easily park the car in the street and take the train to city centre. The host were lovely and responding on our questions was fast and nice. The appartement was clean and nicely decorated. There was a sleeping couch for our son, but they were very nice to also put an airbed in the room. Saved us a bit of hassle with the couch.
The appartement looked a bit different on the airbnb site though. There were a few things missing on the pictures (Nespresso machine, towels, pillows on the bed). Also there was a big TV screen on the wall. Not really necessary for us, but I can imagine a must for other people. :)
But overall a very nice place to stay in. I am not sure if it's the right fit with children though. After 8 we were not allowed in the (very nice!) garden of the Watsons General telegraph because of our kid. So we had to look for something else after a long drive.