We liked Andrea's place, it's a hostel with several rooms of the same type, one huge kitchen and several shared bathrooms. The building is old, but charming, the bedroom I liked a lot, very big, comfortable bed, vintage feel. There is free coffee and cookies in the kitchen, it's also well equipped for cooking. It's aprox 10min walk to the central station. Not sure about the heating as it's very spacious, my boyfriend felt it to be chilly, for me it was ok.
We recommend it :)