The room is really big and spacious! It completely matches the description and is equipped with everything mentioned. The tube station is in 3 minutes walk, train to the airport - 7 minutes. Daniela gave us all the necessary instructions so it was easy to get to the place, she stayed in touch with us via text messages and was ready to help with any issue.
The only problem was that the heating turned off automatically from about 11pm till 6am. I assume this should be due to the central heating system of the whole building and has nothing to do with this particular apartment. But as we were staying in February and the weather was still frosty the warmth escaped the room in nearly an hour and it was quickly getting too cold to sleep. Bearing this in mind, take warm pajamas with you and make sure you have a good room temperature before going to bed (if traveling in winter).