Although pricey, I think this has been both an excellent product, and a great experiment in White Wolf's attempt at PDF only material. I think that with enough goading, they might be convinced to reduce the price on future attempts, especially considering how well this product sold.
On the product itself, I would have to say that although the terrestrial forms were good, they weren't nearly as useful as the Celestial forms, which were worth the price of admission by themselves, or at least I would say so. Those 4 styles alone are very adaptable, unique, and excellently balanced with the game. If you haven't already, do yourself a favor and pick this up.