Thanks to Carmen, we had a good London experience in a pleasant neighborhood quite near Regent's Park for walks and central to the tube in St Johns Wood. Carmen was consistently helpful and reliable even when we lost touch via cell phone . She also went beyond the call of duty to provide air mattress for grandson one night so my wife could join us (the flat is suitable for 3, not 4, as she would tell you). Parking is nearly impossible, so avoid using a car anywhere in central London. The flat is nicely appointed in a courtyard setting but some of the neighbors can be noisy at times. Rooms are small but clean and well furnished, kitchen is easy to use. Overall, very positive ending with Carmen volunteering to help organize the trip to Heathrow. Great job!