Our tour guide was Ana, and I'm sorry, but she had to be the worst tour guide I have ever had in my years of travelling. First off, the Seville Alcazar is 10 times better than Cordoba's, and it was almost a waste of time to see it. The Cordoba Mosque/Church is absolutely amazing and a must see, but you could probably take a bus or train here and save the money.
Ana was our tour guide, and she was very informative and knew a lot about the sites, but she would just talk and talk and talk as well as talk extremely fast. She talked for 1 hour about the story of Spain standing in the heat when we could have learned that on the bus the way there. She then talked for 30 min about a Roman column that was in the dirt like it was the most beautiful thing in the world. She just would give you way more information than you would care about. She could have told us the story about the roman column in 2 sentences, instead, we stood looking a column in the dirt for 30 min and a complete waste of time. Our tour had roughly 30 people in it, and after the story of Spain for an hour, people stopped caring about anything she had to say after that. Her story's were so long it made people not care what she had to say because they didn't want to stand there and listen for 30 min at each stop when t could have been said while walking past it.
After about half way through the tour, about 1/3 of our group just left and once we heard the first story i the mosque/church, everyone else left besides a handful of people. Ana completely ruined the whole day on this tour for my group, and I wish I would have just taken a bus or train and seen these by myself.