I found this place two days before going there and it was much cheaper than others. It was very clean, and there were all the basic things you need. I suppose it's an old building, but you can see that it's renovated.
It was in the middle of the Old Town, close to the Royal Palace and some important churches, but unfortunately a bit far from the other attractions. It means that you really have to be organized to see what you want, especially if you want to visit museums, also because they all close around 4-5 pm (I went on April)!
The only "problem" I had it was that I couldn't do the check-in as late as they wanted (15 pm), because I arrived around 9am and I had just two days to visit the City, but they never replied to my sms. Anyway, when I arrived I called and they led me leave my baggages in the house after 11am, so everything went well at the end :)