Update: 3/19/20I originally gave this product 5 stars, then changed it to 3. Now I'm changing it back to 5.Nature's Hangout reached out to me after reading my review and offered to replace the item. I agreed to give it another chance. I'm extremely impressed with their customer service and how committed they were to making me happy. They promptly sent out a replacement then followed up again to make sure I was satisfied. Which I am.While the overall product is the same, and my experiences which led me to reduce my rating still apply, I now realize that I can't really fault the product itself for my misfortunes. And I admit I have no advice on how the overall strength and durability can be improved.However, I have taken steps to preserve my window feeder and keep squirrels away from it. Unfortunately, my plan to just use safflower seed failed as the squirrels were more than happy to eat it. So, I now ONLY use nyjer seed. Squirrels are not interested in it at all. The downside to this though is that it severely limits the types of birds that will eat it, and around here it's typically finches and mourning doves. I miss seeing the cardinals at my window, but I can still see them on my pole feeders protected by squirrel baffles. But now that the squirrels aren't interested in this window feeder, it hasn't fallen or broken at all.After a lengthy experience now with this feeder, my best advice is to 1) make sure you clean the window before attaching this, it'll help the feeder stay suctioned if there's no dirt and 2) try placing this feeder above a soft ground surface to minimize risk of breakage if it falls and 3) I strongly advise using seed that squirrels don't like as this feeder isn't strong enough to support their weight. One squirrel likely won't cause it to fall, but two squirrels is just too much weight.Update: 10/27/19Changing my review from 5 stars to 3. After 7 months or so of having this up on my window, it has fallen down a few times on its own. It cracked the first time but was still usable. The second time it fell a couple of pieces actually broke off, but again it was still usable. Now it has fallen a third time and it has completely broken apart. I just don't know if the price justifies buying another one after less than a year of use. I wish this item was more durable because I really did enjoy it while it lasted.Original Review March 2019:I'm giving this product five stars because it's sturdy, suction cups are strong, and appears to be a great window bird feeder. However, in my case it has only served as a squirrel feeder.I didn't think squirrels would be able to get to it, but how naive I was. I put it high up on a window with no bushes or other jumping points for squirrels, but they were pretty determined. And when there's a will, there's a way. After several failed attempts to climb the glass, they figured out how to climb the sides of the window to access the seeds. At one point there were two squirrels on it fighting over who gets the treasure.The bird feeder was strong enough to support the weight of two squirrels, but it did end up tipping on its side. I can't fault the feeder itself though, as I could put any feeder on the window and have the same issue. It's just a shame that I can't use it for its intended purpose.