Guys: I am updating this thread after making SEVEN batches of ale using S-04 over the course of about 8-9 weeks. A pale ale, a bitter, a blonde ale, a dark ale, another pale ale, an American wheat and a cream ale. The first batch of pale ale is already gone and it was delicious. If I concentrated very hard I would pick up some slight diacetyl but that wasn't every time I drank it. No sign of it in the bitter and the blonde ale (with Liberty) was put on tap last night... no diacetyl at all. But I have to comment on the character that this yeast brings... it's fantastic. It has such a nice, bready character. No real estery nonsense going on and it drops like a rock. I let it ferment on the lower level of my place (probably in the low 60s) for a couple days and then moved it upstairs. I feel like S-04 is going to be my go-to dry ale yeast going forward after this run of beers. The description on the Fermentis website says "English and American styles" and I agree with that. A smidge more "English" than you might get in a BRY-97 or US-05, 1056, WLP001 but that's okay with me. Cheers Beerheads.