Giovanni's apartment was prefect for our short trip to Rome. It literally is a block away from the Colosseum and the metro stop. We were also able to casually walk to the Trevi fountain and Spanish steps in under 30 minutes (I know not everyone would want to walk that far, but it's a nice stroll). If you are a light sleeper you might want to bring some ear plugs and/or eye mask as it is an apartment in the middle of a major city and you can hear "city sounds". But no one in our group had any issues with this.
The apartment was perfect for 2 couples. One bedroom has a bathroom en-suite which adds an extra bit of privacy. We had plenty of room to spread out, which is always nice.
There is a tiny one-person elevator which was out of service when we arrived. This wasn't a problem for us, but it's something to be aware of if you have an issue climbing stairs.
There was a small mishap where the cleaning person didn't leave enough towels for our group. But I messaged Giovanni and his friend was able to bring us additional towels in no time.
Overall, I would definitely recommend staying here or at any of Giovanni's other apartments!