Micha was really flexible on check-in and check-out - huge thanks for that, as our flight arrived early. The basement is nice and has all you need to stay for a short term. Location is also convenient, it's not the most walkable area, but metro is close so you ven get virtually anywhere pretty fast.
All in all, it's a basement, so you get what you pay for, nothing too fancy. Still, significantly cheaper and better than an hotel, esp. in the same area.