I'll cut it to the chase: we really enjoyed the stay at Luca's place. First of all, he is a wonderful host: he met us at the apartment, showed us around and accommodated promptly our requests (we asked for some dishwashing pills and garbage bags - Luca got them to us within minutes). There was plenty of towels, hand soap etc unlike what we could read in other reviews.
The apartment is pretty spacious for Rome: there was plenty of space for all of us: two adults and one child. Location may be an issue for some but not for us: it is slightly out of tourist areas: about 300m to the Colosseum which I consider a border of the main area where tourists start piling up. For us it was an advantage as the area was not that busy and rather quiet (with the exception of the church bells that where on some days at about 7:45am but Rome is full of churches :-) ).
There was a couple of tiny convenience stores just meters from the apartment entrance and a bigger CONAD supermarket about 700m further.
One last thing, Luca was very responsive: we were exchanging messages via Airbnb messenger and he was replying within seconds.