Substance Painter is rad. It allows you to make sweet fully procedural materials but done in a hierarchy like photoshop instead of the scary node graph town called Substance Designer.
Substance Painter is being used on more than 100 AAA projects currently in development. Usually Substance Designer teams are much more specialized and need less licenses, whcih brings the ratio to 60/40. There are more SP users than SD users in studios out there. :)
@Jerc : I think Substance Painter suffers from its name. I've heard from a fair amount of artists that they tried Substance Painter in the hope of being able to "haindpaint" their textures, even though its strength really lies in the conditional materials and BW generators, and how responsive it is when it comes to…