OK, I'm not sure if other people are giving this product 5 stars purely because it's so sturdy. It does look like a very good feeder when you first see it, but the feeding holes are quite a bit bigger than on other bird feeders I've had, so I think it's unsuitable for putting sunflower hearts in. The first day I put it in the garden, the sunflower hearts started falling to the ground every time the goldfinches started feeding. By the end of the first day, about a third of the sunflower hearts had fallen straight to the ground and formed a pile under the feeder. This doesn't happen with other bird feeders I've had with smaller holes.
I've rescued my old feeder out of the dustbin and started using it again.