Definitely a very strong beginning to a long awaited continuation/conclusion. It's been about 13 years where so much has been left unanswered and without closure.
I remember this series growing up and had a lot of fun watching it, even if it ended prematurely and without an end to the story.
But thats all in the past now. Jack is back.
The darker tone and inner conflict of Jack's character are really amazing. The action is still as awesome as ever. My only complaint is actually hearing Aku's voice replacement. I know no one can replace Mako, but despite Greg Baldwin having only a few lines in the first episode, he just doesnt sound right to me. He did fine as the replacement voice for Iroh in Avatar the last Airbender season 3 and Legend of Korra, but I dont really get the same vibe of Aku in his voice. It just sounds a bit off. For me someone like Mark Hamill wouldve been a better replacement for the voice of Aku. He's voiced the Joker for over 20 years and I get more of villainous over the top vibe from him than I do with Baldwin. That's just my opinion though and maybe Baldwin might get better as things progress.
That aside, everything esle was perfectly solid