A few years back I brewed up 20 plus gallons of middle-of-the-road blonde ale. Along with pitching a good clean ale yeast (wlp001), I decided to use up a vial of the Flemish Ale Blend (wlp665). Really nothing more than an after thought, but with four carboys I figured, why not! Anyhow, the three carboys with the clean ale yeast turned out as one might expect. Clean, crisp, ready to drink in a few weeks. The forth carboy (wlp665) however, was radically different. Initially, the flavor and aroma were somewhat bland. Then slowly but surely it got better, eventually developing just the right amount of sourness along with great complexity and character. Three years running it just keeps getting better and better. I'll definitely do again. Next time maybe time even all 20 gallons!