I agree on the PDF pricing. Definately worth it, and the classses seem pretty decent to me, especially if you're looking for some of the classes that were released in later (non-OGL) books. Are they up to par with the official Pathfinder core classes? Not sure. That's kind of subjective, but I think they're fine.
I also agree the the Artificer needs some clarifications. I'd say that one will see alot of house rules.
Not sure I would pay $35 for a hard copy though. Maybe $20.