Overall I enjoyed my stay at CAB20, it was a nice modern, clean hotel with surprisingly good shower opportunities. And it's maybe here I would like to give my highest praise. It was my first time booking a stay without a private bathrom, and my partner and I were a bit concerned about cleanliness and quantity of showers. To our pleasant suprise the showers were of good size (no claustrofobic feeling) and even had a bench and hooks for hanging the towel. I didn't really count the showers but if I had to guess there were about 20 showers per locker room, and there was in total two locker room divided by gender, one for each. I can only speak from my own short experience, but when I was there the showers were never fully occupied, there was me and max 3 other persons. So I never had to worry about having to wait or not being able to shower.
As for the room it was small, but that were to be expected. Was pretty good sound isolation but you could still hear some of the sound playing from the radio out in the corridor. But it seems they turned off the music at night, or atleast turned the music down so it was inaudiable. Also couldn't hear any of the neighbours even tough we had one right on top of us. We also were lucky by having our room right by the communal toilet. It was small, dimly lit but clean. Was never any line to the toilet luckly even tough there was only two stalls in it.
All in all a great stay.