I've tried wb-06 in hefe's and dunkelweizens, and fermented in the mid 60's and mid-70's, but all my wb-06 brews come out slightly tart. The ones fermented at higher temps get banana aromas, but no banana flavour.
Instead of trying Munich, I turned to Wyeast 3068...did a dunkel fermented at 73, and underpitched. Smelled like bananas during fermentation...but on tasting...tart! Almost identical to wb-06. Argh. I've just put down another dunkel today with the exact same ingredients, which I'll ferment at 63, but if it tastes tart I'm gonna give up and just go back to buying Weihenstephan and Paulaner darn it...