If you didn't watch it, you really should.
It's really awesome
I've watched it like 3 times already but still feel like watching it again :drool
WHY IS IT SO GOOD????

X-BURRRRRRNEERRRRR

Good to watch as a marathon
Not so much weekly

I don't like things were people act as if they are something they aren't, like with that stupid bullet

Happens in the first ~20-30 episodes, after that it gets better lol.

If you liked watching it, you should pick up the comic where the anime leaves off. I didn't watch any of the anime but I did read the whole thing and it was good. I wish it was longer and had more end-game development to it but it wasn't bad the way it ended, neither. They didn't really deeply develop a lot of the characters that would have needed development if the series was going to continue, so it made sense to stop abruptly.

It's good, too many fillers though :s