I just kegged my first brew that I made with Wyeast Yeast nutrient and I have to say "I'm impressed!" I brewed an APA recipe of mine on August 3rd with an OG of 13˚P (1.053 SG) that I pitched my usual 1600ml starter of 1098 British Ale into (1600ml water, 160g DME, stir-plate for 10 hours, chill for 3-4 hours, decant, pitch). This thing took off like a rocket in a matter of 4-6 hours and kept pace for about 48 hours, spewing kreusen through the airlock and all down the carboy. After about 4 days it had settled down and the yeast dropped like a rock. I just kegged it and took measurements on it this afternoon - 6.3˚P (1.009 SG) finishing gravity. That's an 83% apparent attenuation for 5.7% ABV. With this recipe, I normally end up at 78-80% apparent attenuation and 5.4% ABV. This brew is tasty, too; even though its flat and cellar temp. She'll be a beaut' when she's carb'd and cold!
Anyone here have any experience with this product that they'd like to share?