Good hotel in a central location.
Chungking Mansions is a little, but it's by far the best value for hotels in Hong Kong. If you just ignore the touts and hawkers in the lobby it's honestly fine.
My friend and I arrived around 10am which was before the check-in time of 2pm. However, since they had a room ready they still allowed us to check in. The staff were very pleasant the whole time.
The room itself was OK. Terribly small, but that's true of everything in Hong Kong. Two single beds with around 20cm between them, so when my roommate passed I had to sit on the bed to let him through. I also had a very scenic view of the pipes and radiators running outside the building. It was really clean though. There's a TV provided as well.
The toilet is just barely larger than the toilet bowl, so every time you shower the bowl gets drenched. It was so small I had to put on my pants outside the toilet since they'd get wet otherwise. Hot water is provided, and your sheets and towels are laundered every day.
Overall, a good hotel for the price. I wouldn't bring kids here, but for a place to rest your head it's decent.