My buddy and I stayed here for a few days. Although it was an "okay" setup for 2 beds, just note that there is no full divided room and just a half wall divider between the rooms. The sofa bed was quite comfortable actually and I slept well on it. The shower was amazing and I enjoyed every show I took in it. Fully enclosed waterfall shower, unlike many showers you find in Berlin that don't even have a shower curtain or enclosure (WHY?). The WIFI was good as well
What I didn't like: On street level by a noisy intersection. The noise actually was a big issue, especially on Friday/Saturday night when people were out late. I still ended up sleeping well because of being so tired, but if I wasn't that tired, the noise would've kept me up.
I didn't like that the location did not have much around it in regards to cafe/restaurants downstairs, very little options.
I loved that there was a washer and dryer, but I had issues with the dryer. It kept giving a "filter" error, despite cleaning the filter and making sure it was placed properly. I gave up on it and just hung my clothes.
Hope that helps!