Overall, I really enjoyed this flat! It's in a well transited part of Roma so getting on public transport was very convenient. There are eateries on the main boulevard and a supermercato some 5 min walk from the flat, even a great bar/restaurante right in front of the building entrace! The area is not as fancy as other parts of Roma but it did not feel unsafe, even late at nights. Being so close to Trastevere train station is a huge plus! You can get to anywhere in Roma if you go there, and it's a great way to get to Citta Vaticana, Vatican City, to avoid the crush of tourists who take the Metro on the other side to get to Citta Vaticana.
As for the actual apartment, it has everything one would need: completely stocked kitchen, plenty of sheets/blankets/towels, very clean, open and airy with very creative interior designs! And, the balcony was a welcomed treat, especially being on the 4th floor! I was joined by family and they both enjoyed the flat as well. We were a party of three and the flat did not feel cramped, so it is a good size in my opinion. The building has a "quiet hours" policy which is good; however, the traffic from the boulevard will reach the flat, just know that.
Finally, communication with Francesca was very good! She had an issue the night before we were to arrive, communicated the problem with us and got it resolved, all while keeping us informed. She gave us some great tips on getting around Roma; eating spots, transportation, etc. very helpful info.