Juan's studio location was very central to Madrid. It is also easily accessible by two different train platforms, Sol and Gran Via (but Gran Via was under construction/renovations while we were there). If you plan to be out a lot either on business or for the local scene and/or partying, this will be great. It does not have any grand features but all the necessary features. A cooking area, a lounging area, a small dining table, bedroom and narrow bathroom.
Juan was a great host, nonetheless. He responded quickly from the moment the reservation was set up till the day of the check-in. And he was nice enough to be patient about when I could give him an expected arrival date as I was planning to come in from Málaga and it all depending on some other factors.
There was a couple of things that I did not like but did not held against his overall scoring.
The bathroom is narrow as it is already but that shower needs a quick replacing or fixing and that would have been where I deducted half a star. The shower head holder was loose, and when I would turn on the shower the pressure from the water would push the shower head and it would be shooting water across to the other wall and not on me. The tube carrying the water was also sticking out taking up about 1/3 to 1/2 of the standing space in the stall. I kept hitting it trying to move around. It would have been a 4.5 stars if that was an option.
The other thing that I did not like was the bed. It was firm, at first, when I laid on it. But by morning, my lower back was aching a little. I have a sensitive lower back so this was not too pleasant. The mattress did not hold its shape by morning and had sunken in by the weight of my body. Not sure if it was the style of mattress, but it just did not agree with this lower back. So I did not hold it against Juan.
Overall, great place for a quick visit in Madrid or if you plan to be out most of the time.