I was intrigued about this hotel and it's premise, so since I just needed a safe bed in Hamburg for one night, it was worth a try.
The place is easy to find but I arrived late on a Monday night and the area around it was a little crazy, so would I feel safe at night here, maybe 75%. Definitely not in the most attractive/safe area of Hamburg but it's within walking distance of Hamburg HBF so hey it's cool.
The room is small just like you are shown but it's comfy. I do wish there was a little extra space for your stuff- if you have more than a backpack, it's gonna be tight.
Noise control is great- you don't hear a peep out of any of the other capsules. There's no way to have an overview of the 4 stories unless you explore though, which is sad because they offer self-check-in but then you are kind of left to figure it out. First timers, check in at the desk.
The robe I was provided was too small but PLEASE just ask the front desk for a bigger size. The bathrooms on the ground level where I was were ridiculously dark which makes you feel like it's kind sketch. The shared shower facilities are really nice though- minimalistic but definitely all you need.
I would stay here again as long as I'm not hanging around there- the room is really small and hanging out there would probably feel cramped. Great place if you're solo,. only need a bed and not much else.