Squirrel slinky TM pole barrier

Hi there

I have seen the Squirrel Slinky TM pole barrier on the RSPB Feeders link

12.00

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http://shopping.rspb.org.uk/p/BirdAccessories/Squirrel_Slinky_pole_barrier.htm

I am wondering if anyone has tried using it and their success rate with keeping squirrels at bay

Love to hear peoples comments here.

Regards

Kathy and Dave