What's great about this book is the range of the stories. Some have a light tone reminicent of the "Batman" TV series of the sixties, (The Metamporpho team-up even MENTIONS the show) others are dark, pulpy mysteries, (the Neal Adams drawn Deadman team-ups are particularly good) No matter which interpretation of the Dark Knight you prefer, your bound to dig at least a few of these tales.
Nearly every DC Great of the silver age makes an appearance, from Green Arrow to Green Lantern, from the Metal Men to the Teen Titans,(one of Robin's few appearances in this particular book) Batman even teams with Sgt. Rock in World War II,(!) and does battle with Eclipso, a rare villain who headlined his own series. One conspicuous absince is Superman, I guess we'll just have to wait for a Showcase of "World's Finest"