I had the chance to do this tour when it was being trialled and loved it.
She clearly knows the city like the back of her hand, and here she takes you around Cardiff in a way no one else would. You will get to see many filming locations, a number of which are not referenced anywhere else, as well as some context for them, so that you always know where you are and what you are looking at. Sarah is an expert guide, and it shows.
I liked that I was able to take breaks from the tour whenever I wanted. It was very refreshing to be able to stop, walk into a shop or have a coffee, and continue the tour afterwards. It makes you feel more in control of your visit.
Perfect not only for fans of Doctor Who, but also for anyone who might like to discover the city in a new light. I highly recommend it.