This tour could have been awesome, but it was overly crowded and difficult to hear. We were with small children and were constantly in the back of the pack. At times, we could not cross the street with the rest of the group and had to catch up. The guide was knowledgeable and even funny, but he would start talking before the full group arrived and we could not hear himā¦.especially when he was competing with Boston traffic and sirens. Headsets would have made a world of difference and likely changed this two-star rating to at least a four.