We learned about this tour from the guide giving the free Sofia tour, so we were excited to do it when we arrived in Plovdiv. The guide, Konstantin, was really well spoken and knowledgable especially considering he had only given one previous tour. This tour covers a lot of the old town and goes to many sites that you’d normally have to find on your own. You cover a lot of ground in the 2 hours and it’s really worth your time.
So if you come to Plovdiv during your time in Bulgaria (and you better), hit this tour up.