I stayed in Gerard's lovely apartment for five nights to attend a conference at a nearby venue. As a business traveler, I very much appreciated the amenities of the apartment (iron, reliable WiFi, etc.), its walkability and Gerard's attention to detail in stocking it with fresh fruit and coffee as well as a thoughtful selection of fancy toiletries. The apartment is located just off a small, pleasant park and a few blocks from the Marylebone metro stop. I took full advantage of the nearby bicycle station when touring slightly farther destinations. Despite being a few blocks from a major thorough-fare, the street was very quiet with minimal through traffic. The apartment enjoys good sunlight, particularly in the living room, and overall was a cozy, quiet spot to recharge between meetings and excursions through the city. It's within walking distance of a number of restaurants, including a pub on the block, and the Regent's Park (for example, should one be ambitious enough to partake in morning jogs).
Gerard was an accommodating host. He was kind enough to allow an early check-in as my flight arrived in the early hours. In our advance communications and during check-in, he was attentive and helpful in his explantation of the apartment and tips for navigating the city. I would gladly recommend the apartment to anyone considering a stay in this part of London.