If your using this to shovel on packing snow (generally good for snowballs etc), it flexes under the weight, which isn't a shock considering the plastic is genuinely around 1 mm thick. If you hit a layer of ice or a frozen stone by accident, I have had the front of one of these shatter. The plastic is generally brittle and if left out overnight, can shatter when you come to use if the next day. The pole is surprisingly smooth meaning if you wear gloves while using this, the shovel often rotates and the snow falls off.
Basically, go for a shovel that has a D shape handle for decent grip and leverage, and one with a thicker more robust shovel section. These shovels are not "heavy duty" but then, neither is the snow unless your in a mountain region.
I really dont know why these shovels are even still on the market if im honnest because there are cheaper better ones out there. I have seen many holiday tourists come to the Highlands of Scotland ill prepared for the weather conditions, and this just adds to the problems.