I loved it. It was very funny and entertaining, a great tribute to the bright, lively, wacky comics of the '50s and '60s. I laughed out loud at a lot of it, particularly the throwaway bits of slapstick with the Gibbles (and this alleged "kiddie show" was surprisingly vicious to the poor things), but there was a nice birth-of-a-hero story to it as well, some interesting characterization.
Diedrich Bader is excellent as this Batman, a Batman who's as tough and ultra-capable as Batman always is, but who has a dry, self-assured wit as well. This isn't a grim avenger but a Batman who's tempered by having friends and partners to put his faith in, and that's as valid a take on the character as any. It's a Dick Sprang-style Batman, but with modern sensibilities too; his tech is very high, with neat gadgets that seem to be based on the "memory material" technology of the Batman Begins cape, including unrolling batarangs and even a sword inside his utility belt. The depictions of the tech are effective and clever, and mesh surprisingly well with the retro look of the show.
It was amusing to hear Will Friedle, voice of the Terry McGinnis Batman from Batman Beyond, once again playing a young tech-suited hero who was a protege of Bruce Wayne. Although his voice characterization here was much closer to his Ron Stoppable voice from Kim Possible -- which is fine, because his Ron persona is a very funny character voice.
The teaser was classic '50s/'60s Batman, with the ridiculous deathtrap and the giant Sprangish props and the henchmen with goofy names printed on their shirts. And the idea of the Clock King actually having a clock for a face was charmingly wacky.
My one disappointment was that the main title sequence didn't live up to the promise of being an updated version of the Adam West show's title sequence. Andy Sturmer's theme was not as effectively retro as the episodic underscore by the Ritmanis/Carter/McCuistion trio, and the imagery was just a hodgepodge of 3D text with Batman running and driving around in it.