I didn't take the "Communism Tours in Bulgaria", organized by N-Vision, but I went to the Rhodopes on a trip, organized by the same team. Beni is a fantastic guide, driver (!), and coordinator, and it was fun to travel around in the breathtaking mountains. She is listening to the traveler's wishes and expectations, trying to realize as many of them as possible, and eventually, she's super transparent when it comes to communication, costs, options and impossibilities.
The tailor-made trip was great in many ways: food, sightseeing, accommodation, etc. Even the music in the car was great, some retro Bulgarian popsongs from the 1950s, which I liked a lot. She helped me to find out the songs on the internet, so that I can listen to them back at home, bringing back memories of the Rhodopi!