I'm always looking for the "perfect" bird feeder, one that the squirrels can't totally empty in 30 seconds!
It's an on-going challenge. .. very nice, but that posh feeder above wouldn't work for me.
When my bird loving uncle retired, he spent his afternoons guarding his feeders with some sort of sting gun. It didn't seriously hurt the lil rascals, but enough that his birds could eat in peace for a few hours. He swears there is no such thing as one that's squirrel proof, as he tried them all.