I booked this apartment for my parents and 2 young siblings (10 & 8 y/o). The apartment looked exactly like on the pictures, very clean and big enough to stay in for a couple of days. The separate bedroom is great if you have younger kids, while the parents can stay in the living room. It had a great position, literally next to the Marylebone station as well as walking distance from couple of bus stops. Considering you're in Central London, it was also very quiet and felt very safe. We have collected the keys from the housekeeper that waited for us in the apartment and gave us some basic instructions, however there was also a guest book in the apartment with all the info we needed. We have exchanged just couple of messages with Sian before visiting, but we always got a very quick response. My family really enjoyed the stay and we'll definitely consider booking again upon their next visit.