Background: The main character is Ichigo Kurosaki, a highschooler who can see ghosts, and ironically hates shows about ghosts. He meets a Shinigami(Death god/ Soul Reaper) named Rukia Kuchiki who protects the souls of the departed and the living. Normal human's can't see her, or any other shinigami. She was stationed in the town of Karakura Town to help spirits pass on to Soul Society and eliminate evil spirits called Hollows.
Through a hollow attack almost killing Ichigo's familly and badly wounding Rukia, she transfers some of her own power to Ichigo so he can save his family. And so, with Rukia unable to fight because of her lack of power, Ichigo takes on the duties of a substitute shinigami.
Review: Very cool anime/manga. I prefer the manga, because it is funnier. The fighting scenes are very interesting. And in the begining, sword play and physical skill are very important. But later it is mostly just relying on spiritual powers, though still cool.
One thing I don't really like though, is that to me, only Ichigo's fights are really entertaining. Every once in a while there is a cool fight between other characters, but I usually find myself wanting their fight to hurry up so I can see Ichigo's fighting. Like in the Fake Karakura Town Arc, I was just waiting to see Ichigo vs Ulquiorra.
Another thing, barely any of the protagonists die. Only the antagonists die, and I think that is annoying. I get that the good guys are supposed to conquer evil, but they don't really have anything to worry about because, although they may get badly hurt, they won't die.
The fillers are alright, except if you're going to watch this, you may want to skip the Bount Arc and the Kasamioji Arc, they're just kind of a waist of time, and not all that entertaining. They do have their moments, but mostly only the comedic ones.
The voice actors are great, all the big names, Johnny Yong Bosch, Michelle Ruff, Stephanie Sheh, Wendee Lee, Kirk Thorntan, Vic Mignogna, Travis Willingham.
I do wish Steven Blum and Crispin Freeman had parts though, then it would be awesome.
The score is cool too, great composer.
Over all, it's give or take. You could either love it or don't. You will probably be hooked by the first few episodes, then just enjoy the ride. Be careful, there are bumps in the road, but if you're in it passed the fifth season, it only gets better from there.