We had a great time in Marco's apartment. For just me and my wife, it was quite spacious...a nice bedroom with some closet space, a good kitchen with all the necessities for cooking, a quaint living room (with an extra day bed), a bathroom, and an entrance hall...needless to say, we really enjoyed having all that room, as we had just come from a studio apartment.
Marco met us for check in and walked us around the apartment, showing us how to use the stove and washer (which was much appreciated, as we had been backpacking for a few weeks prior), and spent time answering our questions. He left us to enjoy Rome without interruption, but was quick to provide an answer whenever we messaged him throughout our stay.
My wife and I came to love the neighborhood, but it may not be for everyone. It certainly has a large young/student population, so there are plenty of bars and less expensive restaurants, which we really great for us. We especially loved Osteria Pesce Fritto & Baccalia, a little traditional Roman restaurant just a 5 min walk away from the apartment with fantastic pasta and a friendly staff. Parts of the area do feel a bit...grungy, I guess you could say...but we never felt unsafe. In fact, we really thought the area served as an authentic and fun escape from the busier and more touristy parts of Rome. If you like good pasta, espresso, bars, corner stores, and graffiti, it's a good area to be in.
Another plus for this location is its proximity to the Roma Termini station. There are also bus and tram lines that run through the area, but there are two metro stops 15 minutes walking distance from the apartment.
If you like to take baths, you're in luck...but if you like to take showers, it is a bit more difficult as there is no shower curtain, but this was really not much of an issue.
Overall, we had a great stay in Marco's apartment, and would certainly stay again if we travel to Rome in the future. Great host, great apartment!