Judging by period photos of them being tested outside the Ford Plant during the war, I imagine these things were absolute fun to drive in non-combat conditions. I viewed photos somewhere that had no part of the track touching the ground. In combat however I would personally feel quite exposed, even hunched down behind the wheel and viewport, it seemed like it wouldn't provide much protection beyond light small arms fire.

The TMM does have a couple photos of these being employed in Korea as flamethrower units, another nervous job I would think.