AMAZING is what I have to say! Alfonso is incredible. Even though he does not know English, he was very kind through his actions. He was handing us waters nonstop, made sure we were doing alright anytime that he saw us, and overall just made sure our stay was a good one. He made me feel like I was at home. Serena was very kind and was incredibly patient even though we arrived at 11:30pm the first night.
The location of this Airbnb is amazing if you're okay with a bit of walking. It's a 20 minute walk from the colosseum and roman forum, 35 from the Trevi Fountain and Spanish Steps. If you're wanting to go to the Vatican City for the day, you can hop on a 25 minute metro ride for only €3 (€1.50 there, €1.50 back) and it's only a 6 minute walk from their place.
The place was very clean, had towels for us, shampoo and body wash for the showers, and our beds were made every day. It felt very safe - with locks for our door. There are multiple things to choose from for breakfast (croissants, yogurt, bread, tea, coffee, etc.) They allow you to leave your bags at their place on your day of check out in case you aren't leaving Rome until much later in the day. (This is was SO nice.)
Overall, it was a very wonderful experience and I would definitely stay here again if I ever come back to Rome - and I'm sure I will!