Very nice and easy experience. The apartment was just as expected - clean, comfortable, well prepared, great location. A nice combination of home-y but also didn't feel too much like someone's apartment.
The apartment was surrounded by interesting shops, close to Hyde Park and other great parts of London. Every day, we walked to a new neighborhood. Ollie was very friendly via email/text - although sometimes slow to respond. Perhaps because his brother was helping to cover while he was on vacation.