My wife, adult nephew, and I did three tours with when in Rome tours during our one week vacation in Rome. Each tour was excellent. We did the 10 Tastings Food tour (with Roberta), the Heart of Rome and Colosseum Tour (with Massimo), and the Entire Vatican and Vatacombs Private Tour (with Luigi).
Each tour was well thought out and very enjoyable. The tour guides are knowledgeable and friendly locals who have all of the information that you want and brought their own personalities and love for the city and its history to their tours.
We started with the food tour with Roberta. She walked us around the Trastavere, Campo dei Fiori, and Piazza Navona areas showing us how to eat like locals. We were stuffed by the end of the tour and had an amazing time with Roberta. She was very warm and welcoming and made us feel instantly comfortable. In addition, as she knew that we would be spending New year's in Rome, she went out of her way to provide additional tips and recommendation for activities that we might enjoy for the holiday.
We did the heart of Rome and Colosseum walking tour with Massimo. Massimo was entertaining and knowledgeable and made the tour fun for the entire group. He kept up a good pace throughout and guided us through the subject matter with an expertise that demonstrated his deep knowledge and education while also keeping it very fun and engaging.
Our private tour of the Vatican with Luigi was on a particularly crowded day at the Vatican. If we had not been with Luigi, who's enthusiasm for the subject matter is infectious,we would not have enjoyed the experience anywhere near as much as we did. Luigi cut through all the lines, shaking hands and saying hi on a first name basis with every security guard at the Vatican along the way. He gave us lots of additional information and pointed out small details throughout the Vatican museum and other Vatican buildings that we never would have noticed on our own. He was able to answer every question that we had. Even when we started asking about the geographic origin of random pieces of marble in different rooms, he was always able to provide an answer. It was truly impressive. Really made the Vatican experience wonderful for us.
Overall, we would highly recommend this company. there are a lot of companies offering tours in Rome. I am sure that many of them are excellent, but I can't imagine how any of them could be much better than When in Rome.