So far this Birds Choice Hangup Super Strong Window Hook is holding up well. I have it on my front kitchen window, holding up a hummingbird feeder. The instructions were really easy. I had to soak the suction cups for two minutes in warm water before applying to the window. I have had it up for over a week now in direct 90+ degree weather and its still holding strong. I would definitely recommend. I love being able to see my hummers up close thru my window. This hook made it possible!