For a first visit of Rome and without any knowledge of the city, I can say that I've been really lucky to find this place.
Mirko is a nice host, available and very accommodating.
The apartment is ideally located. It takes ten minuted of walk to go to the Colosseum.
The subway is three minutes away which is very convenient (don't rent a car in Rome, it is a non sense).
But above all, this apartment is an extremely romantic place for its atypical configuration, its small and very charming private terrace and all the cares that has been brought to its decoration.
I highly recommend it.