We were a family of nine adults (with two grandmothers aged 85 and 76) and two small boys (aged 4 and 2). Billie found us a nice bus to take us around even with the very limited time we had (less than half day). Our cruise line Norwegian Spirit took longer than expected with its tendering operation so we got to dock and start our tour kinda late. But Billie made the most of what little time we had. She also did it in a very cheerful and resourceful manner. Billie had a sunny disposition and she told us about the history of Montenegro and the Balkans. It felt like we made a friend in Kotor in the space of half a day. Thank you Billie! I highly recommend her if you are visiting Montenegro.