I booked my trekking through this company Adventure Mountain Explore (AME Trek) and it was very good arranged. I also had a very nice guide, Min Thapa. The officer of the company Mr. Tika Regmi helped me to find a trekking that suited me best. Langtang is a great area to do some trekkings. I was impressed with the local people and beautiful mountains. My team helped me a lot which was very nice. I would recommend this company to any one planning trekking trip to Nepal.