"The location was great, safe, easy access to most things you'd want to get to including the train, and the bus from the airport stops a block away. The staff were friendly and tried to help with any issues I had.
The facilities are nice, with amenities like a quiet room in the chill area and lockable food storage nooks. Some quirks - the doors to the small shower rooms open inwards making closing them potentially a challenge for you, (the shower itself is great). My locker was finicky any time I wanted to open or shut it, and the washers were busted while I was there, so I get the sense maintenance is a work in progress. Cleanliness varied a lot, as you'd expect in a hostel.
The magnetic doors to the capsule do not lock, and the magnet to mine didn't keep the door closed, so I had to wedge my bag against it. You can sleep with your stuff, but put it in the lockers when you go out.
The capsule lets most sound in, but everyone on my floor was respectful. The kitchen on the 2nd floor is busy in the morning, I'd suggest the third floor if you want quiet.
The beds were a pretty bad issue for me: the mattress is really just a 5 inch thick matt on the wood, and you will feel that. The light from the ac control panel is bright, you'll want to find a way to cover it up, and the ac itself helps but is weak.
In summary, if you can sleep on anything, (or like extra firm beds) I'd really go for it for unbeatable price and great location. If not, maybe spring for an actual bed."