The flat is in a great location, situated in just a few minutes walk from the underground and from Hyde Park. The apartment is underground as described, very little and with no natural light. It is a good choice if you are out all day and just sleep in like we did. Since there are no windows, the smell was a bit stale. We also had a problem with the door, which was stuck when opened and very hard to move. During the last night, we had a problem with the fire alarm, probably due to the battery that was dying and it kept beeping all night long, so it didn't let us sleep much. Apart from that, overall we had a good stay.