I am buying another.  I love this feeder and so do the hummers.  I wasn't getting much action until my friend Arlene told me how picky hummers are to clean feeders, so I cleaned it thoroughly with soap and water, bottle brush and tooth brush.  Then I rinsed it a couple of times to get ALL the soap off. Now the hummers love it, except that one hummer has claimed it as his territory and chases off intruders.  So I am getting a second feeder so that I can get more hummers.  I'll report back in if I buy a third.  My hummers are most active in the morning.  About 7am.  But they come around all day.