If I understand their site correctly, the maximum recommended load is only 100 pounds and the normal rig is designed for 50 pounds. That's not nearly enough. Many folks backpack routinely with 50 pound loads, although it is better to be lighter.

I note they do not give the weight of the conveyance itself. It looks heavy, somewhere between seven and ten pounds (I am guessing).

It certainly has possibilities. I have used enough wheeled Stokes litters to believe that the wheel is here to stay and is indeed a good invention. But I am not standing in line to get one.