The whole place is beautiful and what Juan is doing is incredible, his attention to detail is pretty impressive, everything is as you see in the pictures (in fact the pics don't do it full justice).
Our interaction with Juan was very limited as he was busy working on the property, One thing I would recommend is being clear on check in time as we arrived to Seville at noon but Juan said we could only check in at 3.
He did however allow us to leave our stuff at his place after check out the next morning.
The pros:
-The location is smack in the center and walking distance to almost everything
-The place is unique and one of a kind
-The bed was comfortable although the top bunk was difficult to reach and the ladder provided wasn't very efficient

The cons:
-Because its central the bedroom overlooks a busy street that is always noisy (late night and early morning) so it was difficult to get a good nights sleep
-Due to the house being old it got pretty cold during the night (there was a heater available), but i was still cold.
-Juan was working on the property throughout our stay, which was ok until we had to sleep as he was drilling and the noise was very loud