Place in a very centric place, really close to Plaza Mayor and walking distance to Sol, Cava Baja and other places which is great if you are in town for a couple of days.
As stated by many other reviews, beware of the narrow entrance and the stairs (didn't count but would say around 100).
The place is a small studio (a former attic probably) but it was rather clean (namely sheets, towels and bathroom). We didn't used the sofa to sleep but it seemed a bit rough and the mattress a bit tough for us and there is no way to close out the natural light (for some may be a problem). The entrance of the building and the doorlock of the studio were safe but seemed easy to break.
However, Carmen and Jaime were very communicative before our stay and gave us suggestions about where to eat.