Have had it a couple of months now and have never seen it not do it's job. Even when the squirrel hangs on. I have seen them hang on for 3 times until they can take it no more. Great fun for the kids to watch. The only problem is that the squirrels tend to not try anymore.

Second SquirrelStop purchased through Amazon. Depending on the construction of the feeder, I have finished the battle of wits with these 'rodents'. 90% of the time this product will deliver its objective. That is to toss the furry into space. "They" did tend to cling to the feeder constructed of softer material such as wood. Maybe they could develop a model with a supercharge takeoff that kicks in when this is detected.

emc