Ok ya it took me a while to get around to watching the first six episodes (don't ask why, i'm dumb or something) but damn I gotta say Mami Kawada can rock !
I've always been a fan of her more "pop" or "techno" type stuff but Joint is one hell of a song.
The way they blend the song into the scenes for the OP is really, really, well done a lot of kickass symbolism that fits perfectly with the emotions of the singing perfectly. Especially when the chorus kicks in and we see Shana fighting that chick with the eye that sends her flying. Really well done.
to the anime staff that handles the OP scenes.