We bought one from The Back Yard Bird Shop two years ago. It failed to attract hummers. We wrote to the mfg. They told us to wait, that the juvies would get used to it. Wrong. We have gone through two seasons. Zip. The hummers eschew the HZ. We hung the old standbys, The Perky Pet feeders next to The HZs. The hummers flocked to the PPs. Still do. The HZ's were pricey, too. But they , simply, do not work. The wee birds do not like them. Whether it is because the ports are difficult to discern, are not painted yellow, or what: who knows? But we do know the hummingbirds do not like the HZ's. Save your $. Stick with the PP's. They work.