Volumes one to eight were fantastic; I couldn't knock 'em. But the final volume and the ending -- too rushed, no substance. Seems like Kishiro might have been under a lot of pressure to quickly finish the series there and then; the pace and material just didn't fit well with the rest of the manga. I'm sad to see Ido was just forgotten about, too. I wish it did end after the baby bomb and picked up from there in Last Order*, where Kishiro had more time to continue the story in a more satisfying, wholly developed way... but I guess he might not have even considered the opportunity for a sequel at the time.
Despite the lackluster ending, the series was still a phenomenal read. Brilliant art, a captivating story -- amazing characters, too. Nova is such an interesting villain and Alita, in my opinion, is one of the best cyborg characters ever. Plus, those octopus lips! Now, let's see what the sequel has to offer...
* Just started Last Order; so glad to see it does!