Very lovely and comfortable house. We didn't miss anything. The safe for the key outside the house is perfect for groups and morevover because you don't have to take the key with you on your daily trips.
Communication with Ben prior to our arrival was really good. Check-in was not as flexible as we thought (we checked in at 1pm, but that was fine for us). The house had to be cleaned in the morning due to the stay of other guests before. I guess the checki-n is much more flexible in the morning without having guests before.
Crystal Palace (7-10 minutes by foot) is a nice place to stay for a couple of days. Nothing special in my opinion but it offers lots of pubs and restaurants if you don't want to go to London or stay at home.
The transport to London is quite easy although it takes around 30 minutes from Crystal Palace to Victoria Station + the time to Crystal Palace station (a bus-stop is situated directly at the main road).
We had a great stay at Ben's home and would definitely come back.
Highly recommaned :)