I'm going to be very honest with this review so everybody can expect (in detail) when you book at this hostel. Let's start off with the staff; they all speak and understand english very well, and are very friendly. They all helped me when I had questions about the neighbourhood, or other small things, which was a big pro. I didn't have a confirmed seat on my flight back, but paid for the room because it was leaving at 0:15 the next day (at midnight). The boss of the hotel told me to call him if I wouldn't be able to board the flight, so he would keep the room free for me just in case. This was an amazing gesture, which shows how friendly the staff of the hotel really is. Apart from that he also helped me with the transport on my way back to the airport (a cheaper and faster alternative to the MTR; Bus A21!)
Now about the rooms;I was scared of cockroaches and/or bedbugs when I came to the chungking masions after reading a lot of bad stories and reviews of hostels, but was very surprised to see how clean the rooms actually were. I had everything I needed to sleep and eat/drink, which made my stay very positive. The ONLY con I could find of this hostel was the fact that they didn't completely clean the bedsheets while I was staying here. They provided clean towels and tidied the bed daily, but they didn't clean the sheets (I kept my eye on a small mark on the sheets, and it was there every day again).
The room is bigger than I expected (still small!), so overall, great hostel!