I couldn't imagine a better place to stay in Rome. The neighborhood (Trastevere) is magical. It is made up of tiny cobblestone streets that are full of shops, restaurants, bars, etc. and it is richly authentic (i.e. practice some Italian before you get here - but I mean that in a GREAT way). The location in Trastevere is also great because it is a 10 min walk or so across the bridge and you're instantly in city-centre Rome, just another 5-10 min walk to anywhere you want to go (Colosseum, Pantheon, Trevi, etc.) All in all, I am so glad I stayed in Trastevere as opposed to any other area. We saw a lot.
The place itself looks just like the pictures. New, fresh, sleek, air-conditioned, and it has plenty of amenities as well including espresso and more. Internet was great, everything was clean, and the building was cool (there was a fantastic authentic Italian restaurant right below the apartment).
Service was spectacular, Marco in particular was like having a five-star hotel concierge at your service. Readily available by email and (SENSITIVE CONTENTS HIDDEN), he came over several times, once to show me how to use the air conditioning, and another time to fix the electricity. The electricity went out in the apartment just for a few hours, we probably just had too much going on (we had 5 guests, one using a hair dryer and the air conditioning units were running hard). I got in touch with Marco, stepped out of the house for a few hours, came back, and the electricity was running again.
Also, getting there was great, they arranged for a private pickup service who was waiting in the airport for us with a sign and it was 60 euro. A van with enough storage for five people and bags right to the doorstep, hard to beat. I enjoyed it much more than I would have an Uber.
It's not the only way there, however, as you can take public transport for much cheaper if you'd like to do a little walking. This is what we took on our back to the airport at the end of our stay.
Overall, probably the best Airbnb experience I've ever had and I'm really happy I got to visit Rome for the first time like this.