The place is ok, but I would not recommend it. Although in the ad it seems like it might be a spare room in someone's apartment, in fact it is basically a hostel with 5 rented rooms and 8-12 people going in and out at all hours (at least 2 people per room, sometimes more). There is only 1 full bathroom (with shower), and a second toilet, so be prepared to wait any time you need to use the bathroom or shower. In addition, the apartment is clearly not built to handle this level of turnover/use, so even though the cleaning people work hard and do a good job, it's a bit run-down/grubby just from the sheer volume of people going through constantly.
On the positive side, the location is excellent, close to the metro and to lots of good restaurants and bars. In addition, the bed was very comfortable, which is not always the case in this type of place.
Unfortunately, the place is poorly insulated and there is a lot of noise from people coming in or leaving, so it's not a good choice for a light sleeper. Also, although the room does not have a real window, there is a high-up glass brick opening that looks into the neighbouring room, so if they turn their lights on in the middle of the night, it can be an inconvenience. Due to the lack of window, the room is quite stuffy and warm. There is a fan, which helps a little.
Check-in and check-out were easy, no complaints there.