Ivan was knowledgeable and communicated well. He was also very accommodating in advance when we learned that our cruise line changed our tour location from Kotor where our ship was originally to have docked, to the new port location of Bar, Montenegro. This change occurred a month in advance, so did not require any last minute changes on his part for us. My only complaint is that during our tour he answered at least 6 or 7 business-related phone calls (as he explained), which took time away from us and made us feel that our tour was of secondary importance to him. I would never mention one or 2 phone calls that might occur for any guide. But it became annoying when he was frequently working on other tour arrangements that had nothing to do with our private tour with him.