My friend and I did the Three Passes trek this April with Desire Adventures. Dzare was our sherpa, and we couldn't have been more lucky. After completing the trek I can say with certainty that there is no better sherpa in Nepal than Dzare. An experience to remember, and we are definitely coming back. If you are doing the Three Passes trek, make sure to eat apple porridge before each pass in order to succeed. Desire Adventures should be your choice if you ask me, and if you have the choice to choose your sherpa, there is only one valid option in my opinion, and that is Himalayan Goat - Dzare.