Third Rock provided us the best guide we could expect. The guide was decent, friendly and knowledgeable. He explained most part of the trek. Everything we experienced was magnificient. At times, I patted on myself for selecting the trek. I was offered great food, and accomodations. Everything was beforehand managed. I didn't have to say single word for anything. I am writing this service to reflect the good service I was offered during the trek. Third Rock has my 5-star for their service.