Hired from Ace the Himalayas because they have the highest number of reviews. They are also on the pricey side, but the service is worth every penny . There were clear and prompt communication between the guide service and me throughout the entire experience from booking to end of service. The agency gave me a thorough debrief and equipment list prior to departure. My guide Rajan spoke excellent English and had an amazing sense of humor. Rajan was very knowledgeable of local cultures and customs in addition to mountains. The porter Pratap spoke limited English but was extremely attentive and friendly. The agency was also very flexible in extending or changing itinery to suit my objectives. Rajan was also well versed in First Aid and that skill actually came in handy several times over the trek. We helped out a fellow trekker whose porter had no medical knowledge, and the other guides and tea house staff were not able to provide the same care that Rajan was able to. Again, the price for Ace the Himalaya is extremely justified, definitely a top tier guide service and excellent experience overall.