An amazing deal, with the big bed and a lot of the perks of a full-fledged capsule hotel for the price of a hostel. Everthing is as clean and well-kept as a hotel too--absolutely no hairs in the bedsheets or any of that nonsense. Hostel rules still apply though; towels are rental, for example, and the front desk will close at 11 PM or so. They even serve free toast and hard-boiled eggs + one drink for breakfast!
Note that while close to the station, the paths are rather narrow, and it's a metro station with only stairs. Take care with the luggage you bring.