We strongly recommend choosing a safari company on the basis of three criteria: quality, economy and treatment of its workers. The last point is often overlooked by travelers searching for the best deal. In October 2012 we went on a 7-day safari with Nyika Treks, visiting Arusha, Tarangire, Serengeti and Lake Manyara National Parks and Ngorongoro crater. We would give this company a perfect grade. Our guide was amazingly knowledgeable and very personable. The accommodations were a nicely spaced mix including a tented bush camp, a tented permanent lodge and very luxurious hotel lodges. All of this cost less than half of what we were quoted from a different company. The owner of Nyika is a local businessman in Arusha who treats his employees well and pays them considerably more than other, more conspicuous, safari operators.