Eloisa's studio was really great! Located a bit outside of the touristic area but nonetheless still central. I could walk to most of the places I wanted to see and the metro was just a few minutes walking away.
The studio is small but big enough for one traveler! Because of the hot weather it was really hot inside, but there were some fans inside to cool down.
Everything I needed was there and Eloisa gave me some tips what I could do and see in Madrid.
Only downside was that the water in the shower turned cold very quickly. After 5 minutes there's no warm water anymore ;)
But overall the place was great and I can recommend it!