We stayed there for a few days in April.
The apartment is very close to a bus that went directly in the city center, we almost never had to use the tube during our stay, that was a really great point. The instructions to find the apartment and our room were as clear as can be, with even some visual instructions to make sure we found everything alright.
The common parts of the apartment were very clean and well kept, and our mattress was comfortable. The room itself was not as clean as we would have expected (the carpet had clearly not been vacuumed enough and there was a bit of mold on the wall next to the window).
However, we still think the room has a great value for its price, and would recommend it to anyone on a budget wanting to have an easy access to the city centre.