I should have started a thread just for bird feeder reviews.
I have another feeder that I use for peanuts that no squirrel has ever breached. Chipmunks can get inside so I don't use it when chipmunks are active. But it has been discontinued. While it has a pretty good design, it was made of junk material. There is a threaded rod in the middle which rusted out really fast, less than 6 months in actual use. Hubby had to remove the original, which involved breaking the welds on the bottom and squishing the sides a bit. The hanger threads onto the rod and the feeder is unusable without the hanger. The top should have had more of a slope because water gets into the feeder from the hole the rod goes through. I had to put a rubber washer on the top to keep the water out of the hopper.
I have to take a picture of it since I can't find one on the 'net.