My hummers love it. I like standing within 10 inches watching them eat.  Suction cup and the two prongs that hold bottom on on r the weakest links. Suction cup needs to b stronger.  The prongs broke I superglued worked for awhile.  Needs to b a stronger attachment. And the container holding the food gets discolor end and turns yellow.  Unable to clean it. Used bleach and used vinegar.