Our 7 day stay was very pleasant, the apartment is exactly as described. Comfy and spacious, nicely decorated and fully equipped with everything you might need: towels, pots, pans & cutlery, dishes, washing machine & detergent, clothes dryer, hair dryer, iron etc. We even had sugar, salt, coffee and tea waiting for us in the apartment which was a nice touch.
We were greeted by Federico who showed us around and explained everything to us.
The apartment is located in the quiet part of Trastevere, away from all the noisy bars, in an old, but very charming building. However, the noise isolation of the apartment is not very good and a particular neighbour kept their TV at a high volume which might be disturbing for some people. During the day we were mostly out of the apartment and during the night we had earplugs with us so we didn't mind that much. Some minor repairs could be done in the kitchen sink area because there were some small wholes in the wall where water would accidentally go each time you wash the dishes, but other than that the apartment is in great shape and perfect for a couple. Internet works good, water was hot (but remember to switch the boiler on before taking a shower and switching it after you are done).
It has a very good location because you are 5 minutes away from the busy area of Trastevere (full of bars, restaurants and really scenic streets), about 10 minutes of walking distance from the Vatican and 7-10 minutes of walking distance to the old city center (you have to cross the Giuseppe Mazzini bridge and you are basically almost there). There are several bus stations quite close to the apartment or you can easily find electrical scooters & bikes to rent.