Amazon Review, Great Bird Feeder February 22, 2013
Reviewer: Mike G
Bought it for a black oil sunflower seed feeder. Works great! The birds have to work a bit harder to get the seeds from this feeder versus a tube feeder, consquently you get more bird viewing for fewer seeds. Easy to fill. Fun to watch!
Brass Original Bird Feeder - Amazon Review August 12, 2012
It is a different product (bird feeder) than most, however, seems to work well, and the birds do seem to like it.