We customized the Tengboche MONastery trek-10 days. My sister loved to stay at Namche Bazar and Tengboche for 2 extra days. We learned a lot about Buddhism, and local people there. Got chance to interact with the monk there. Our stay at Namche was great. Our guide was fantastic. He managed everything with little effort maybe because he had great connection with the people there and we were impressed greatly. We have talked with Naba for next trek to Gokyo Lakes and he assured that we will have the best itineraary.