I would also say it is S tier for the task it is designed for. My class went camping once and one of my classmates brought one of these with canned pie filling. This led to an arrangement where I would start a fire in the morning while they were all huddled in their sleeping bags, and they would make me pies while keeping warm in front of the fire. I'd say I had the better end of that bargain because I both got to make fires and eat pies, but they also seemed happy with the arrangement.