Overall, we were happy with our 9-day stay. The neighborhood is great, the metro is close, and it was comfortable. Best as a homebase for exploring vs say working remotely. Key notes:
1) It is *small*. Especially the bedroom, where there is almost no room on either side of the double bed (and we are small people). The space is used exceptionally well to fit a lot in and to not feel overly tight once you are settled, bedside aside. Still, I can't imagine staying here with 3 people, unless one is a small child.
2) Worth noting that there isn't really any natural light in the apartment. There is ample lighting inside, which I'd describe as medium quality. Some is nice, some is harsh.
3) Alex was super responsive and helpful. Really a great host.
4) Bathroom overall is nice, and shower pressure is good. Bathroom door doesn't quite close all the way.
5) Heat settings are controlled remotely by Alex, though you can ask him to adjust, and you can adjust individual radiators to turn on/off