The Class Acts PDFs introduce new class options for the base classes and core classes featured in the Pathfinder Roleplaying Game. Every PDF contains two full pages of high quality content (no fluff or filler)!
A couple of thoughts: the animal-domains-granting-cute-animal-familiars trend is a major part of the established animal domains first featured in Ultimate Magic. The "variant channel energy" powers are also based on established terrain domain abilities (see the Aquatic and Arctic domains).
Regarding the Volcanic terrain domain - in order to use the ability, you need to summon a fire elemental, then command it, then explode it. All you get for your three (or maybe two) rounds of work is a fireball with a number of dice equal to the elemental's Hit Dice, at best. Good, but not ruinously so.
Well, yes, but you could also use this ability with swarms of firemephits, for example. Yes, it takes some actions, but multiple little bombs can be quite devastating. Hence my objections. And regarding the familiars - my point exactly - that has already been done multiple times. And I considered it somewhat weird when Paizo opt5ed to go familiar instead of companion as well. ;)
This is a great series of well-balanced and creative content. I love it. I bought Witches last night, and today I bought Druids, Rangers, and Fighters. It's all been great so far. I didn't get any of the others because I'm just not that into those other classes- what else is in the pipeline?
Jackissocool, I'm glad you're digging our product line. Even if you don't go for the cleric class, you ought to pick up Class Acts: Clerics, too. It's full of domains that any domain-using class (like inquisitors, druids, and some paladins) can use.
As for pending projects coming down the pipeline... well, just check out this thread.