Almost everything was perfect, after staying for a week we only saw the other guests for seconds at a time in the common area so it's quite literally almost like staying on a hotel room plus the possibility of using a washing machine and a quite well equipped kitchen. And a really great hotel room at that. Quite beautiful minimalistic interior design, with a VERY comfy bed, plenty of storage space for clothes, and a decently sized bathroom with a big shower.
The check in and the communication with the host were perfect. I messaged her quite a few times and ALWAYS saw her instantly pop online to answer before I had any chance of putting my phone away. There was also a brilliant booklet in the common area with tons of recommendations for what to visit and were to eat (that weren't what everyone already knows). The check out was as quick and easy as leaving the apartment after placing the keys in a box in the common area.
All in all it was a really great place to stay. I would no doubt leave 5 stars if the fridge hadn't broken during our stay, spoiling our food and leaving us with no practical way of cooking our own meals, making us spend a little more than we anticipated since we had to eat outside every single time. It wasn't the host's fault, and they came to check inmediately after we told them, but it's tough to leave 5 stars after that. The showerhead also didn't work perfectly (though it was very usable).