I've been using this feeder for years with success.  Recently, I replaced it with the same model bought at a local hardware store, and the quality was terrible as the plastic fingers at the bottom of the hopper that keep the 2 parts together would crack after a few uses.  However, the one I bought from Amazon was fine.  I suspect the ones bought at the hardware store were sitting in their warehouse for a while as the their boxes looked old.  The one from Amazon looked new and fresh.