Window Birdfeeder

BF bought me a new birdfeeder because the squirrels ravage my small birdfeeders.  It suction cups to the windows. Initially I was concerned that no one visit.  So far, I have seen a male wren, several chickadees, and these goldfinches.  I stand to the side of the kitchen sink and marvel at the beauty of  my fine feathered guests!!  The chickadees take the sunflowers and crack them on the side of the feeder.  When this first happened, it scared me to the willy nillies because the feeder bangs against the window.  As I am looking out, one of the goldfinch were looking at me.  Hmmm... what are they thinking?