Yeah, it was good. But, like everything, WB had to eventually ruin it. "This show is much too high quality! Let's replace it with more Japanese card playing monster type shows!!!"
BTW- On Justice League Unlimited a couple of weeks ago, they got thrown into the future and Batman met himself as an old man as well as the future Batman from Batman Beyond. (They also had a tie-in for Static Shock, which was interesting).