I booked a 3-castle tour with Bogdan last September. I'm really glad that I took a tour with him! For one, we had good conversations on Romanian culture, everyday life, politics, and even the changing state of the country during the long drives to the castles. He also told the legends of the various castles, and stories about Romania's previous rulers.
During the tours itself, he would often share little anecdotes and facts that the castle guide didn't mention. He was also good at turning dull moments around. I would definitely recommend booking him for your next trip to Romania.