Check Inn is the middle of Wan Chai, a great location. They have a decent hangout area with a view to the super busy main street, but that also means you can get a metro, bus or a cute old-school tram as soon as you step out.
There's a guide book for places to eat, from cheap to amazing, Michelin recommended spots and coffee shops as well.
It was generally a good stay. Try making sure you don't get a top bunk as some bunk beds are 3 levels, and the top is not only not tall enough to sit, but it can get super hot as well in the heats of Hong Kong.
Note that towels are for hire and lockers don't come with a lock, so you gotta buy one if you wanna use the locker or bring your own.