It was a very nice stay. One of the most centrally located accommodation in Madrid. The place was clean and well facilitated. The best thing is that everything was automatic. Very high-tech! The owner was very responsive too. For example, I requested to extend my stay twice in the last minutes and got the answer immediately; or when there was some problem with the AC in my room, Jorge sent someone to fix it immediately the next morning.
The only thing I would like to suggest is to add rules about the trash separation in the common kitchen. I know in Spain people do have certain trash categories, so I would love to see different trash bins for organic, plastic, glass, etc.
Also, as I stayed for almost 2 weeks, I had to use the laundry service and it was quite expensive (about 3 E for washing and 2.5 E for drying).
Overall, I loved the stay at CasaInnMadrid. I will definitely choose it again if I have chance to come back to Madrid.