In planning our trip, we found it somewhat difficult to distinguish between the many tour operators and ultimately found Yeoong Travels (www.bhutantourpackage.com) through reviews on TripAdvisor. My fiance and I took a 10-day sightseeing/cultural trip to Bhutan in April 2013 with Yeoong Travels and had a wonderful experience. We were originally set to do the Druk Path trek but fiance got injured. Despite our big change in plans just 2 months before our departure, Chime (organizer and correspondent) was able to completely change our itinerary to have more sightseeing and a few short hikes.
The entire trip was very well organized with flexibility for us to spend more time doing/seeing what we wished. Our guide, Sonam, was extremely knowledgeable and our driver, Sangey, was very skilled at navigating the rocky roads. The accommodations were all very nice (all of them were listed in Lonely Planet guide) and meals were all good and overabundant with food. We visited Paro, Thimphu, Haa, Bumthang, and Phobjika valleys. It was a trip of a lifetime and if we have the chance to go back someday, we'd certainly do it again with Yeoong Travels.