Overall a fantastic place to stay in Madrid. Clean, comfortable and full of ammenities or everything you need for a short or long stay. Very new too.
Highlights were: bug and comfortable sofa, huge closet, new kitchen, lots of storage space and great natural light. AC was also much appreciated in summer.
I stayed here for a month with my girlfriend and we were very happy with our choice.
Its may be a bit far from the city center (at least to walk from there) but the metro is just in the corner and its easy to move from there.
Would definitely reccomend, especially for longer stays or students.