The best: location. Close to the metro. The heating works very well. The possibility to check in after 12pm (with an extra cost). Building security.
The worst: communication with the host. From the first day, it was very difficult to talk to the host. Sometimes he didn't answer or when he answered it was a simple "yes / no". Check-out is until 10 am, we asked to leave afterwards (around 11 / 11:30 am), but they were adamant. We even offered extra money, but it didn't work. If you wish to negotiate your check-out time, this is not the place. The kitchen lacked the most essential services, like a real knife among others. The main bedroom window is broken, so it is very difficult to sleep. The room is also very noisy. The house is on a busy street, so there are cars at night. The bathroom needs repairs. The host only gave us 3 towels. We were 3 people, so there were no extra towels or face towels.
Other information: after 1:00 am, the only option to reach the house is by taxi (from the central station). As we didn't find a taxi, we paid 23 € on Uber (January 2020). There are mini-markets close by and a Carrefour Express as well.