I am a firm believer in the sugar brick. Used them this winter and am sure placing the bricks over the cluster saved some of my hives...even though they were full of honey. Now I have taken them to the next step. I now make up the sugar brick with a lot of BeePro powder in the mix. The bees won't touch my pollen patties, but they are tearing up the "Pollen Bricks". They luv 'em!