Very clean! It was my first time at a Hostel, so I had the image of the dirty metal cage hostel that you see in movies, but I was genuinely surprised at how upscale it was. Looks exactly like the pictures online. Also the bathrooms are so clean, new and stylish. Showers are very big and they have a small divider with a small bench to place your clothes on so they don't get wet. I didn't use the kitchen but it looked clean and I did see people cooking there. Elevator requires use of your room key card so no non-residents are getting in. The lock box is a bit small, I could fit all my chargers, passports, documents, keys, a few books, etc. but I couldn't fit my laptop (which I expected as it is big) so I hid it under my blanket and close the curtain and it was safe. You also get a little square bench that you can put your stuff in but there is no lock. No A/C but it was early October so didn't matter. The pillow and blanket are comfortable and you get a strong light with a dim setting (which is still pretty bright at night). You get one European wall plug with two shelves, I think (cannot confirm) I saw some other beds have two USB plugs as well, but mine did not.
Very friendly staff. I couldn't figure out how to lock the lock box, it didn't work when I tried it nor when another roommate (who could successfully use their own) tried to lock mine. So I went down to ask front desk to help and they came up (even thought they were clearly busy) and unlocked it right away, it was one of those moments where the staff could have been grumpy that I made them come up for nothing but they were very polite and friendly.
Check in and out were very quick/easy (they offered me a free breakfast on my first day)!
Note: no hairdryer, no A/C, bring towel and shampoo/body wash