Just spent 5 nights here and had a great time seeing a lot of what Rome has to offer. The location of this property is great - easy walks to the Colosseum and the Trevi Fountain (and much more). In fact, as we love to sight see on foot (you don’t see much from the Metro!) we walked everywhere - except to get to the Vatican City (as we did not want to get lost and miss our pre-booked tour). We did walk back though.
Marcus is a great host and the apartment has all you need whether you are staying 1 night or a few more. It really is nice to have a home to go back to at the end of long hot days on foot, rather than an impersonal hotel room. (The apartment is very spacious.). You also have the benefit of self-catering if you want a break (as we did for a day or two) from restaurants and take-away lunches.
If we return to Rome, I would definitely stay here again.