We had a great time at Elena's apartment.
It's very beautiful and faithful to the photos.
The location is very interesting because close to beautiful attractions and in addition, there are nice shops and good restaurants nearby.
Small note, the apartment is on the ground floor and the front door is directly on the alley. Although very convenient to get in and out, it's a bit louder than we expected. Nothing catastrophic but at least we would recommend to people with a light sleep to have earplugs.
I do not have a huge experience staying in Rome but I would be very comfortable recommending Elena's apartment to relatives and friends, taking care to share the same warnings.
;-)