I can not believe it. I had so many bird feeders squirrel proof where squirrels ate all the food but this one is amazing and really working!!! look at the pics where you can see the squirrel getting stuck inside the hollow part. 
The bird feeder is really easy to build and to plant in the ground. The top part looks heavy on the pole but even with the weight of the squirrel it didn't move. The birds are enjoying their seeds while the squirrel are getting depressed!! one of them stay half a day in a tree close by trying to figure out how to get to the seed and it just couldn't!
I love it!