Could have been very useful addition to the logistics package for afganistan. 250 metric tonnes for the largest version, might take 10 trucks off the road.
Its a big target that moves too slow militarily.
But for civilian cargo ut looks efficient, especially for things like oil rigs as suggested by another poster, or storage tanks and large hvac units for commercial buildings. Or prefabricated houses.
All those things difficult to move on the roadways.