It was very entertaining, informational and yet fun! We had a small group, as six more were expected, but were delayed. So five of us were lead by an irishman, and the group included a russian, two canadians and two americans. We visited, learned, laughed, connected and saw a great part of the nightlife of Madrid that we would have otherwise missed. Our tour guide was great - he was nursing a cold (and subbing for another) but he was charming and informative. The tour was one of the highlights of our trip to Spain. If our tour is indicative of what you expect, you will have a lot of fun, enjoy it and hopefully learn from others about cultures different from your own.