My girlfriend and I spent 3 nights in Rome and stayed at Lorenzo's apartment. It was a perfect apartment for a couple and in a great location. The Air Conditioned worked perfectly so I am not sure what issue the reviewer had below.
The locations is near the Colosseum and Forum but also in a very quiet and quaint neighborhood with lots of restaurant options.

Lorenzo was an great host and met us on the street when we had trouble finding the apartment.

We would highly recommend Lorenzo and his apartment to anyone considering a trip out to Rome.