First all of - the location is perfect! The Schlafoase consists of 4 apartments in a private little courtyard in the basement floor of a building complex. It was certainly an oasis, being so central but still sheltered us from the hustle and bustle of the city. Communication with the host was good and the amenities nice (they had a TV with free Netflix, provided a baby crib, let us use a washing machine and a dryer and had a nice kitchenette with all the essentials). The apartment has a cohesive shabby chic/rustic style, with a cohesive color scheme and sweet decorations.
This all being said, I must admit that it was far from perfect. The Moonlight apartment is a one room studio with a bathroom. The floorplan is a bit off in my opinion; there's a huge desk/storaging unit that takes up a fourth of the space, which I think should be swapped for something like a sofa and a reading corner. A desk doesn't have to eat up that much space. The side that faces the courtyard has three big window panels, one of them which is the door. That makes the room very bright and delightful, but on the other hand, it also means that you cannot open a window without actually both having your door open (at night, whilst you're sleeping) and having your neighbors pass by and look in, straight through your living space and on your bed. I'm pretty certain they've all seen me sleep naked by now.
The Schlafoase, Sleeping Oasis, emphasizes sleep, and I must admit that we had a bit of a hard time sleeping sometimes. The first night we kept the door closed, not feeling comfortable with leaving it open. The room got extremely hot, the air stuffy and the oxygen levels felt low (there's no carbon monoxide detector). So subsequent nights we left it open with aforementioned drawbacks. We had a one year-old traveling with us, so I guess noise and light are more of a problem for us than the average traveler. There's a light that turns on whenever you move close to the door (e.g. to go to the toilet). I get the point of it; it's hard to find the light-switches if you'er arriving late in the night, but it was still a bit of a bother not being able to turn it off. There's a fan in the toilet that you cannot switch off. It switches off automatically after a (rather long) while, but it's quite noisy. For the first two nights of our four night stay, the bathroom door made a very loud squeeky noise. We notified the hosts who took care of it midstay, but it meant that we had a hard time using the toilet while the kid was sleeping before it was fixed. That also meant that the door was kept open in evenings, the fan going on whenever we moved around. The last night the toilet started constantly flushing. The smaller button had been broken throughout our stay and somehow it promted the toilet to start a constant flux. There is a rather loud waterpump that pumps water for the toilet and the shower, so since the toilet flushed every 4 seconds, that did as well, causing a loud rumbling. It was very late in the evening, so our hosts couldn't do anything about it, which I understand, but it certainly contributed to a working against the sleeping oasis we were expecting.
All in all, I think we were unlucky. I don't think that the larger problems we ran into (noise from bathroom) is typical for any traveler's stay and I don't hold it against the hosts, but I do think that the hosts should try staying there for a couple of nights. I think that might clear up a lot of little things that could be remedied, making this into the sleeping oasis that it could very well be.
Again. Hosts were pleasant. Location splendid and the courtyard secluded. I would rent again, but I'd certainly rent the bigger apartments if traveling with my family.