Guy is super responsive. We booked the apartment the day before our check-in as my kid was admitted to hospital on the last day of our London stay. He has been very helpful and responsive throughout the process. The location is very convenient for access to the city (and the hospital!). It is basically in the middle between two tube stations. As I was with 3 young kids, we always walked 5-6 mins to take the bus (nearest public transport) for 2/3 stops then took the tube. The photos look slightly larger than the actual place. The sofa bed is very comfortable and my kids enjoy the stay.