Well, on the overall, this d20 game supplement isn't a bad product, but it's not what I would have liked to get. This Atlantis is described as to fit with the Classical Greek period (Plato was the first to speak about Atlantis). As such, you get an history of Atlantis, new character races, 4 new prestige classes, a few skills /feats /spells /etc. making this product an excellent supplement if you want to run a campaign set in ancient Greece, and/or Egypt. In such a setting, Dwarves, Elves, Gnomes, etc. would be ridiculous; so you would get a good alternative with the races given in this booklet, which fit well in that kind of mythology.
However, as far as I am concerned, I was deceived magic kind; reminding of the last Disney movie), and not related to ancient Greeks. If this is what you would also like to get, this supplement won't be up to your expectations.