There are a lot of really good things about this show, but the one aspect that stands out most to me is just how good the Action actually is! It seems like every episode has a chase or fight that constantly leave me saying "Oh man, that was so cool!". Seriously, the fight choreography is wonderful, especially for the super-powered hand-to-hand, which WB Animation has proved time and time again that they've really got down pat.
The only thing that keeps the show from being perfect is the writing. The writing bad by any means, though. In fact, most of the episodes have very interesting plot lines, but I feel that the show often lacks the time to focus on characters, and Episodes that do focus on the character interactions will be hit-and-miss depending on your tastes in dialogue. Understandable though, given the 11 minute run period. But the potential is there for two- part finales, like seen with Batman: Brave And The Bold!
All in all, incredibly pleased with the series. If you follow DC's wonderful history in animation, this show is the next big step in the staircase.