Ive stayed in the double as well as the dorm room. The Double room was basic but has all you need, like all Hong Kong places its very small. But the bathroom section looked newly tiled, and the room was proper and clean. They provide fresh water and hot water, so make sure to bring some tea if you travel in winter. The place didnt smell like tabacco! I would recommand the double, probably also single rooms, as they where in the same section, so I asume the single rooms will also be fine. For Hong Kong this is a safe option, just dont expect hotel standards.
The dorms where not that great, there on a different floor. The matrass of one of the beds in my room was really hard, like a rock. So I choose a good bed, but I felt bad for the guy who slept on the hard matress. Also there is only 1 bathroom with shower that you share with many people, and it doesnt lock well. Unlike the single and double rooms sections this place did smell like tabacco, which smells horrible. Would I sleep here again? Maybe, but next time I rather take a change on another hostel with dorms.
So Double/Singles, your safe. Dorms, maybe consider another place! You defenitly survive a night in the dorm, but I think there will be places which are a little bit better.More