Its a nice little apartment for two right in the middle of Rome. The pictures judge pretty well the location. The apartment is quite, with a tiny balcony for smokers...
If you leave it for a walk you will find yourself just in the middle of one of the nicest tourist spots of Rome. For instance: The newly renovated luxury department store "Rinascente" is three minutes from your apartment, "Fontana di Trevi" only 30 seconds away.
I did't use/tried the guest-couch - so in case your are more than 2 people there is some possibility - but than the flat would be pretty packed then... I did't met the owner but a nice guy called Rudi instead. He is available for you if there were any issues ..
Absolutely reccommendable