We were very lucky to stay at Alberto and Marialetizia's penthouse for these reasons:
The location - The penthouse is located in Monti, one of the best places in Rome for a home base during a visit because of its great atmosphere, wonderful restaurants, and convenience. It is in walking distance to almost everything and is within 5 minutes walk of the Metro for any sites that are further away.
The penthouse - The penthouse is very clean, spacious and stylish. We really appreciated the amount of space for our group. Having three bedrooms and two bathrooms was a big plus as well as the washing machine. The beds were comfortable and the location was quiet for sleeping. The views of the Colosseum, Arch of Constantine and the Roman Forum were amazing from the balcony and wall of windows in the living room and dining room. A bonus was the additional balcony and wall of windows in the second dining area looking out over the Victor Emmanuel II National Monument.

The host - Alberto far exceeded the outstanding hospitality we've experienced from Airbnb superhosts. He arranged transportation from the airport that was professional and a good value (related to our other experiences). Due to health issues, we needed to take taxis instead of walking as originally planned. Before our trip, I asked Alberto how I would go about arranging this. He volunteered and took care of all taxi arrangements during our stay there. In addition, he graciously arranged an additional shuttle reservation after we left Rome. We appreciated his excellent recommendations for restaurants in the area also. Alberto's kindness, responsiveness and hospitality made our time in Rome much easier and more enjoyable overall.
Note: We discovered after getting there that Alberto's wife, Marialetizia, has an Airbnb homemade pasta making experience in the same building that gets great reviews. So, next time we plan to add this to our schedule.