The apartment is very clean, there is plenty of hot water, and the heating is great. Plenty of public transport next to the apartment (about half an hour to the center of London). Comfortable bed, functional kitchen. Easy check in and out. It is highly recommended.
The only comment is that the window blinds do not completely darken the room and there is a little light that penetrates at night and in the morning - for those who are bothered by this, you should bring a blindfold :-).
Overall an excellent experience.