The place is really central. It's not a ten-minute walk to the city center. IT IS in the city center. Having a fridge and a small tower fan in the room is really nice and useful.
The room also has a small balcony which is nice, and although it's not a big one, I prefer a balcony over a window. :)
The self check-in process was perfect, with a detailed description, and you don't have to worry about the time of the check-in (we did it around midnight).
I strongly recommend Maria's place to everyone, if you want to relax and enjoy the city without worrying about the place you want to stay in.