Third Rock Adventures turned out to be the best choice for my trip and my guide Bimal. He was the best guide we could have asked for. He knew when we needed a break, fabulous English, kept us motivated and ensured we were in good health checking our oxygen and heart rate every night. He knew so much information about the mountains around you including heights and stories. He made us laugh and by the end we became great friends with him. He made the trip!! We would recommend this service to anyone in future.