I did the tour with Marta, and she was an amazing guide! I would one hundred percent recommend her! She gave us explanations on many details of the city's architecture that we would never have noticed on our own, so it was a very nice addition. She was very invested when answering question even when they weren't directly linked to the history of the city of Krakow. She gave us amazing recommendations, especially restaurants. You can tell she is very passionate about what she does, and it only makes the tour more enjoyable!