The location of this apartment is great. It's in a safe neighborhood close to the Vatican, has easy access to public transportation and airport shuttles, and is within walking distance of plenty of restaurants and stores. Simone was very responsive, gave several recommendations in the guide book in the apartment, and all check-in/check-out instructions were very clear and helpful.
While the apartment does have wifi, it was very slow when we stayed there. It was almost unusable with more than one device connected. May not be a huge issue if you'll be spending all your time out seeing the city. If you have any work to do or video calls to make while staying here, it may be a problem.
There were a couple other general privacy/comfort issues that were less than ideal. One of the bedroom doors wouldn't latch closed. We couldn't get the shutters to fully close in another bedroom and the small curtain is transparent (not ideal in any case, especially being at ground level). The bathroom doors have large, frosted glass windows in them that very mildly obscure the inside of the bathroom from the hallway, but not much.
All in all, we enjoyed our stay and Simone was very helpful and communicative. This particular apartment wouldn't be my first choice next time we're in Rome.