We just returned from a wonderful trip to Slovenia/Croatia with Odysseys-Unlimited. We had 3 days on our own in Dubrovnik as a post trip. I booked 2different day trips with Cheap Dubrovnik Tours. One was a full day to Bosnia and the other a full day to Montenegro. They answered my e-mails promptly, and the guides were very knowledgeable. It was just the two of us, but they have tours for larger groups too. You pay at the end of the tour. We were very happy with them and recommend them. www.cheapdubrovniktours.com
I agree with your recommendation, they are one of our best tour companies.
My friend and I also booked day trips to Mostar and Montenegro with Cheap Dubrovnik Tours based on the numerous positive reviews of this company. Andro responded immediately to email communications and our need for clarifications and expectations. Our guides, Dino and Zoran, were fantastic, providing historical information about the area in which we traveled and stories of the area which were fun and informative. I am grateful to Andro and Dino for helping us at the last minute adjust a tour to accommodate our transportation need to reach our next city. I STRONGLY recommend this company