First of all, we had a lovely stay at Juan Jesus's place. The space is EXACTLY as on the pictures. We also received good tips and even great suggestions on where to eat (really, ask him for the restaurants at Muelleuno, we tried them all and you will not be disappointed!) The bed is good, it is very comfortable.
The only points I would like to mention that I didn't notice in the review is that there is very little daylight. The apartment is in between 2 other buildings. There are ample windows but due to the height of the other buildings, little sunlight comes in. This gives the feeling of a dark and cloudy day in the apartment (when the lights are turned off) while it can be bright and sunny outside.
Furthermore, the apartment is noisy. Obviously, there are the hallway sounds, the AC noises from the adjacent apartments and the sound of the elevator, which are all to be expected in an apartment complex. What was unexpected though, was the sound of water rushing in the bathroom. It was loud and happens on all hours of the day, also in the middle of the night. Sleeping without earplugs was not possible. So, take earplugs and you will be fine!