I have won sacks from cargille twice... the first time they let me get a sack of Dingemans Pale which was great, and the second I had to get "cargille" label only. I went for their euro style pils malt, and my efficiency went down the tubes (about 20% drop both with a single 150F infusion and a 120F rest, 150F sacc. rest). I loved the prize, but had a lot of frustration predicting my gravity with the cargille brand pils malt... both batches were way below the predicted gravity on a system that is extremely predictable. I am not sure if it was the sack or the product, so it may have just been a single sack of slack malt. The remainder sits unused until I run out of rahr malt.