I stayed in Hotel MK for 4 nights. I booked a single room, which was the size of a shoebox. The room is really small, 6m2. But I was only in the hotel to sleep and shower. So it wasn't a problem at all. The room is clean, shower is okay.
Location is perfect. Nearby MTR station Mongkok. Very nice people on the street. I walked alone to the hotel at 23:30 at night. Had no problem at all. I can recommend this hotel to anyone who is travelling alone. Had a really great time, and I would come back here.