We arrived late at night and the check-in went smoothly even though we arrived at like 23:00 at night. We were 3 adults and we managed fine, even though the place is a bit small. But if you're only there for less than a week with 3 people or less, it's perfect.
The location couldn't be better, as you're in walking distance of pretty much everything and the busses to the locations that are a bit farther away are very close as well. Electric scooters are also almost always to be found in the streets just outside the apartment, so it's really easy to get anywhere you want. It was only when we had to go to the Vatican that we didn't walk. Everywhere else, we walked. To the Pantheon, to the Colosseum, the Venetian square, Forum Romano, the city centre, pretty much everywhere.
I HIGHLY recommend this place if you're 3 people or less, don't plan to stay for more than a week and you want a very central location where everything is very easily accessible. If you can live with a small kitchen and the confines of a small apartment regardless, this is the place to go to!