Saw The Immortals, not bad, not great. It was fun, visually gritty and appealing, and they didn't shirk at gore. It just felt a little weak in narrative, like the main theme (of living righteously) wasn't well represented, not as well as - and the comparison will be unavoidable wherever you go - 300, which was so singular and effective in its direction and execution.
Either way, The Immortals is an entertaining film. If you liked 300, The Immortals is bound to please.