The hairy, downy and red-bellied woodpeckers will go nuts over it.
I've only seen a yellow-bellied sapsucker on ours once...and the pileated woodpecker and the flickers shun my suet entirely.
But I love pitching the blind near the suet and sneaking pictures of the hairy woodpeckers.
It really ticks them off when you post their pics
, Hairy Woodpecker! Take that!!!