We found out about the LivItaly Tours (limit to 6 people) a week before we arrived Rome. Luckily we were able to cancel the group tour we booked and switched to LivItaly. We have a family of 5, and end up with a private tour of Colosseum Underground , Palatine Hill and Roman Forum tour.
Our guide Sergio was very knowledgeable. He encouraged everyone to ask questions and kept our 10-year-old engaged. We all learned a lot in an afternoon. Highly recommend this tour!