The apartment was small but perfect as a base for visiting Rome. It is s few blocks from the Colesseum (which can be seen up th street) and the heart of the city, and just down from a "gay bar" area in one directions and Piazza San Giovanni in Laterno in the other so there are plenty of places to eat and drink within a couple of hundred feet. The photos are 100% accurate and the place is clean and has all needed conveniences including a welcome basket of fresh an delicious fruit.
Though Antonella was not in town during our visit she connected with WhatsApp and is warn, friendly, and cheerful. (After all, her avatar on the site is a portrait of a cat). We did meet her Marco and he too was very nice and helpful about volunteering to keep our luggage until we left some hours after checkout time.
The apartment is up only a few stairs and the building was pleasantly cool in the July heatwave, as was the unit even without the AC.
If my Italian has not failed me "Celio" means "I jest" but I would just change a couple of letters around and call it "cielo" for "heaven."
We would recommend Celio for a couple and it could even handle four people, though there is a single bathroom and bedroom with two having to sleep in the living room, as accurately shown in the photos.