I had an absolutely wonderful stay at Emily's place. The neighborhood, Belsize Park, is only a few Tube stops away from Euston and St. Pancras, and easily accessible to the airports and central London. The flat itself is a very easy walk from the Tube station - just cross the street and walk straight for a bit.
The flat itself is lovely and comfortable, just the right size for one or two people (I was traveling solo, but the room can comfortably fit two.) There is a kitchenette if you are planning on cooking simple meals, a fridge, and a washing machine. The bathroom was nice and while some have called it small, I actually thought it was fairly spacious by European/major city standards. The mattress on the bed is soft, which might not be your cup of tea if you're used to a firm mattress, but I sleep on a soft mattress at home and found it to be quite comfortable. The decor is great and the neutral hues are really relaxing after a full day and night out.
Communication was great throughout - I interacted with Tanya, Emily's assistant, and Phil, who lives in the building and helps out with letting guests in and such. They were both great and very helpful. I had no problems communicating with either.
Thanks again for the great stay - will definitely be back!