This SafAle US-05 Ale Yeast works like it should. I have yet to have a bad or underperforming brew with this yeast, in fact I typically have rather dramatic fermentations using it. The one thing that I have noticed is that the preferred pitching temp listed on the SafAle packs is lower than that listed on many of the Northern Brewer instructions, so pay attention. Several of the instructions list pitching at 75-78 degrees when this yeast prefers lower than that, closer to 70 deg.