I'm surprised no one else has written a review for this yet.
B'T X Neo, the sequel to B'T X, is by far much better than it's predecessor.
The story takes the original premise and dives much deeper into a darker, more exciting plot.
It follows on Teppei's quest to defeat the Machine Empire and save his Damsel-man in distress brother. If it stopped just at that, I'd have chucked my copy in the bin, BUT, instead it works on fleshing out our characters. We delve into their pasts, into their relationships. We look into the dark past of the Machine Empire, of the war, of the reasons and the motivations our Heroes draw strength from.
Sounds cliche right? But it isn't. It's dark, bloody, and damn straight depressing. But it's GOOD.
Travelling towards the climax of the story, the writers have managed to insert an intensely epic atmosphere into the original story. It's what classics are made of.
The religious undertones provide a kind of mythical, mysterious darkness to the story. You start to question humanity, you start to question what is right and what is wrong. The great thing about this story is that it doesn't beat you over the head with either. You can choose to watch this philosophically, or you can equally switch your brain off and watch it for sheer excitement/enjoyment.
...I did both former and latter from time to time.
It also has heaps of twists and turns that sort of leave you jaw-dropped for a second or two. For me personally there were also heaps of heart-wrenching moments that really made me want to curl into a corner and cry my eyes out. If an anime can do that, you know you've got something good.
Improved from the prequel. You'll find the colours are more striking and the detail better.
OST still kicks ass.
Improved significantly. The twists and turns keep you addicted and as with the prequel --you never know who's going to win (in the long run I mean).
Fan-f***ing-tastic. Epic. Classic. Exciting. Thrilling. Funny. Heart-warming/wrenching. EMOTIVE (which is always a good thing).