Wow .. it works
After a couple of weeks .. squirrels gave up .. but now i miss their antics.

Built Like a Tank
Have two Heritage Farms bird feeders, both built slightly stronger than a tank. One is "squirrel-proof" and seems to live up to that claim. The other is an older non squirrel resistant model (18 yrs) still totally intact and doing the job after that many winters/summers at a harsh 8000 ft. altitude. For some reason, the birds like the older one better. But of course, so do the squirrels. Last winter, even a female elk thought it would be fun to bang her head against the feeder to loosen the sunflower seed. Would recommend Heritage Farms if you want virtually a lifetime investment however.

no match for the aggressive squirrel
I live in the Houston area and the squirrels are a huge problem for my bird feeders. I took a chance when I purchased this feeder. Within one week, the squirrels had knocked down the feeder and broken the top hinge. It is still usable, but it did not solve my squirrel problem and I'm on to look for other feeders.

Squirrels thwarted, customer satisfied!
Bird feeder has solved the squirrel problem for the time being. I preferred the smaller, cylinder style feeder as far as birdwatching goes, but couldn't find one that was squirrel proof.

Best Bird Feeder I've Had
I bought this feeder through Amazon. This was my third attempt to get one that wouldn't primarily feed squirrels. The feeder is really great! I have watched the squirrels try to get into it and the cover just slides over the food. The feeder attracts a great variety of birds and hold about 10 lbs of feed at a time so you don't have to fill it very often. (the birds knock a lot of seed on the ground so there's plenty down there for squirrels). My feeder is hung from a tree branch and not mounted on the pole. My only wish: a better color or color options. But this is a great feeder and much better than anything you will find at your local Lowes or Home Depot.