Dear Vladimir, I thank you for your thorough review!
You could not find better in Trastevere, value for money.
The skylights are characteristic of these old houses, but replace them the next, with motorized blackout curtains, a big financial commitment that will surely increase the price of the apartment.
In the center of Rome, we are used to speak out loud because they all know, as a country! They even put the chair outside the home, and make friends with everyone ... That everyone wants to stay in Trastevere!
The air conditioner in the apartment has four functions: dehumidifier, cooling, heating, ventilation .... you just had to turn it on! ..... is the norm in the last days of July with high temperatures, the humidity is high in Rome.
A big hug!