I stayed at Atelier Breyer for three nights for my first trip to Berlin, traveling with my family. It was a comfortable stay and Martina was welcoming and pretty flexible, given that I arrived earlier than expected. She also brought over an iron when we inquired about one on the second day, as my folks tend to wear things requiring pressing. The apartment is spacious and well-situated; we couldn't have been happier with the location.

The only minor downsides were the single bed in the "bunk room" - as a previous guest noted, it's not supportive and my brother opted to sleep on the couch in the living room instead. I stayed in the sleeping loft above the single bed, which was fine for me. However, not sure how often the ladder is dusted, as there was a cobweb and spider there.

The shower was what I'd call "unique," as the curtain only covers about 1/3 the length of the tub so be careful with the handheld shower head ;)

But apart from that, I'd certainly recommend the apartment to a group of younger travelers who want some space and like the idea of self-catering within steps of Freidrichstrasse. It's a lovely apartment.