I recently received my new hummingbird feeder and I'm super excited! I have not been able to attract hummingbirds to my home yet and I'm really hoping this helps. The feeder is very easy to use and refill with whatever liquid feed you are using. The top comes off easily and snaps back on very securely. The suction cups on the back have held the entire time so far! Just make sure to clean your window beforehand. The feeder is also easily moveable from one spot to another, just pop off the suction cups and repeat. Having the feeder on the window is ideal so you can watch at your leisure. I havnt caught any hummingbirds visiting yet, but I have it placed right near some flowers to help attract them. Would recommend!