Instruct: Classify a given review as either positive or negative.
Query: Fatal Flaw in Design

While it seems intuitively obvious, I nonetheless read the instructions on how to mount this. Then I did what it said: cleaned the window, attached the suction cups to the feeder, wet the cups and pressed it against the window. Only problem is this: the plastic rim on the back of the unit around the suction cups prevents you from firmly pressing the cups against the window. Result: the unit stayed put for less than 30 minutes before falling off and breaking into sticky mess.Something in the design or installation of this unit needs to change.