Me, my wife and 2 other friend use Adventure great g Himalaya  service for our 21 days Kanahcejunga circuit trek, it is our third  time in Nepal but last 2 treks use another different agency.
During our trek, we found Adventure great Himalaya and team are very professional,   Guide Ram, Porter pasang is awesome, they do hard working and Always Smiling,  if you looking successfully Kanchenjunga trek, go with them, highly recommended