It would be difficult, I think, to find a more centrally located place to stay as the apartment sits on the edge of Leicester Square between Leicester Sq and Piccadilly Circus tube stations.
While the apartment building itself is a little run down, Hui's apartment is clean and well maintained. Each room has an independent key and Hui was kind enough to give me a key to the building as well so I could come and go as I liked. The shared bathroom is small but again very clean.
I did not interact with Hui much as she lived in an independent apartment which only shared a front door with my room and I spent most of my time out, but when I did she was very helpful.
Personally I felt it might be a little overpriced as it does not offer much in the way of facilities, but the location goes a long way towards addressing that.
The apartment would be ideal for a group of 3 - 5 people in London for a short time (say a weekend) and looking for a place to keep their things and a roof over their heads whenever they stumble in.