We were two couples traveling together and Massimo's apartment was extremely reasonably priced and literally across from the Colosseum, which was awesome for us. The neighborhood is adorable and there are lots of good restaurants, and Massimo gave great recommendations. He was very communicative and helpful before check in. Its a very cool space and with two beds/two baths its spacious.
The cons were that the wifi was very spotty - no big deal for us, but could be frustrating for a business traveler. The apartment was very, very hot because of the temperatures in Rome. I think this is just unavoidable when Rome was so hot, and Massimo provided ample fans. Finally, it was very noisy. The bedroom closest to the street was quite loud and we had trouble sleeping with the noise.