I was a solo traveler, and I highly recommend Laura's place.
The apartment was in the perfect location for me. It is in the heart of the Trastevere neighborhood, shortly after you walk over the bridge. I felt very safe walking around the neighborhood alone, even at night. There is a supermarket within a 5 minute walk, and there are a lot of restaurants and bars within a short walk. It had a very "local" feel, and the cobblestone streets were fun to explore. I was also able to walk everywhere in Rome, including the Vatican, Coliseum, etc. It's not close to a metro stop, but that did not bother me.
The apartment itself is very nice. I was pleasantly surprised by how comfortable the bed was. There are basic supplies in the kitchen. The wifi worked perfect for me. The bathroom is small, but plenty of space for one or two people.
Laura met me when I arrived in Rome, and she gave me a quick tour of the apartment. The lights went out one night, and she responded to my message within 30 minutes with instructions on how to fix it. She was a great host, and I'd definitely rent one of her apartments again.