Honestly the story builds a solid ground for the series, but that's all. From there on there's no significant movement up.
The characters are stiff, speaking fainly, acting like they are on their first attempt of showing to the mirror that they can fill the characters. Although the bad try to imintate a vision of a person, it's more important to become the characters and to act natural, make sense in every mimic or not if that's the purpose, but definetely there's no purpose in there.
For the script only one thing, bad writing, poor imagination for dialog plus bad knowledge for natural, smooth, fluent conversation. All dialog are soo forced.
And finally, terrible finale.
After all that's my evaluation. Poor.