it is. in our may event I had 5 completely new teams that i was helping, they all cooked on 1 WSM using one of these. With heatbeads the WSM chugged away from 8pm until 2pm and still had enough fuel left for hours more fun!
Apart from building your own it is probably the most cost effective solution. I am also looking forward to having a play with the 120 which has just been released.