It's certainly worth rewatching. I've been hard to please recently, so this one (and Casshern Sins) are probably the two best shows I've seen in months. Contrast that with all these.
Rosario + Vampire
Shuffle
Negima
Fruits Basket
Kaze No Stigma
Golgo 13
Pumpkin Scissors
Sengoku Basara
Excel Saga (tried twice)
All couldn't last more than an episode or two recently. Some didn't last half. Eden's certainly a keeper.
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Random Encounters Suck