I tried it, still needs some more time to carbonate in the bottle, but, the 3.5 lbs. of raspberries was plenty, VERY GOOD! Mine is a light beer, only 3.6% alcohol and 15 IBU's of tettnager hops so the fruit flavor stands above the others.
I brewed this as a 10 gallon batch, and split it into this version with the real beeries, and the other 5 gallons went into a keg, where I added 4 oz. of the raspberry fruit flavoring extract, then force carbonated it.
The one with the exctract may be a little better beleive it or not, I was suprised as well. Of course with it being force carbonated, it is already up to the proper level and the fruit flavor is just about perfect for my taste. My wife even liked it
I will be making this one again.
-Tom