I really loved this place. By Hong Kong standards it was massive (I stayed alone; it would fit two comfortably and more with a bit of a squeeze) and I liked the location: a very short walk to the Mongkok MTR but away from the most crowded, noisiest part of Mongkok. There were lots of little details, e.g., all of the power strips were universal, which I really appreciated. I'm not a huge fan of the tiny bathroom-cum-shower situation, but I suppose it's fairly standard in units like this in HK.
The only issues I had were that the internet was very, very slow (I had trouble uploading photos), and the gate on the door made it very difficult to get in and out with luggage.