I bought two of these for the edge of our garden to rotate compost piles. Raccoons can take the cover off, so I bungee corded the cover to the sides. Squirrels immediately burrowed under the sides and scattered the compost everywhere. I lined the bottoms with chicken wire and the squirrels chewed holes into the doors. I'm not sure if heavier plastic would have kept them out, honestly. These will blow over on a windy day if they aren't full. The spikes in the bottom don't go very far into the ground.
Even though they aren't the best, I don't know what else I'd buy instead. A pile is too messy by itself. The turning ones get too heavy. But for the price, these'll do!