The flat was very comfortable. The location was great, and very central. I walked to the Tate Museum, St Pauls, Regents Park, Kings Cross, etc. Lots of good restaurants nearby. The bathroom was nice and the kitchen well equipped. The building and area seemed very safe.
Do note, however, that they have several apartments and the one you get may not be the one you see in the photos. I got a similar apartment but it was lacking the "dedicated workspace" table. Also the photos show a flat with big widows looking out at rooftop level. Mine was one floor up, had smaller windows, and a different kitchen. I do not see any photos from the flat that I was allocated. I mentioned this to the owners but they said the other flats had all been booked so I could not move. Luckily the flat I got was fine. I would stay there again now that I know what to expect.