We really enjoyed staying in Simon's apartment, we were with a 12 years old child and the residential neighbourhood was just perfect and quiet. There is a nice small garden at the back and the 2 rooms' windows are located there so there was no noise at all, we did not feel like we were in London! Simon kindly allowed us to keep the place for the whole check-out day as we were leaving in the evening and he did not have any reservation for the next day, that was really appreciated!
We received the check-in instructions a few days before the trip and everything was clear. We found the place and the lock-box containing the keys very easily. Simon was very quick to answer when contacting him through Airbnb and even though we had his phone number, we did not need to contact him by phone.
The only downside (out of Simon's hand) is that we could not find any real nice English pub in the area (but maybe we did not look hard enough) and there was some trouble with transports that weekend (gay pride + Shepperd's bush train station which was closed on Sunday for construction works), so we spent a lot of unanticipated commuting time.
But overall a very good experience, which we recommend.