We spent a lovely week at Evelina´s place. The apartment was matching 100% the listing, and we found everything as expected and explained in the description. It was clean, luminous, well equipped...nothing to add.
Best of all, it´s really close to St Pancras international station (5 min walk I would say), and King-Cross underground station. And what we found even better is the bus stop in face of the building (really, just cross the street and you´re there). Several lines connecting you to some of the hot spots in London are stopping there (e.g. 10, 390). This is extremely convenient, specially if you travel with kids. My 2 kids loved to take the bus in the morning to start touring the city (and also the way back home in the evening, with all the Xmas lights and so on).
We did not met Evelina, but the communication was extremely fluid and kind. She answered our messages almost instantly!. And the procedure to get the keys was very convenient so that we were not stressed by arriving late: just get the key from a lock box and you are in.
Beware: it´s a 3rd floor without a lift (as clearly indicated in the description, by the way), in case that matters to you. You shall also be prepared to suffer from some of the inconveniences of staying in the center of a big city such as London: expect some noise from the street, buses, ambulances, police cars etc.