One good thing I guess one might be able to say about that "tank" is that it would be rather difficult for an enemy soldier to attach a magnetic mine onto its hull if it were moving fast.
It reminds me a lot of the Disston Tractor Tanks that Afghanistan bought in the 30s. These were agricultural tractors, normally to be used in that role, with an extra kit, which was a complete fighting compartment that could be placed over the Tractor when war made it neccessary. They were mobile MG nests basically. But any tank is better than no tank! However I do believe we have found some of the "worst" tanks now!