I was a bit worried about another live-action adaptation of an anime / manga, but I wasn't disappointed at all!

Visually, it is very well done: CGI is great and characters seem "realistic" enough, if you can say that about manga characters (what I mean is they didn't overdo it with the orange hair ^^)
The visuals are similar to what you see in the anime, which I thought was really cool. It did feel a little weird during certain fight scenes, but considerering the crazy fights featured in the series, they did good job at bringing them to life.

Casting was flawless in my opinion: Fukushi Sota was a fantastic Ichigo (I fell a bit in love) and I really liked Sugisaki Hana as Rukia. They both showed the characters' emotions really, really well.
I loved the secondary characters too, especially Saotome Taichi as Renji, Mano Erina as Orihime, and Yoshizawa Ryo as Uryu. Miyavi as Byakuya was also a pleasant surprise!

Most of the movie follows the "main" storyline of the anime's first season (Ichigo and Rukia against Renji and Byakuya, sort of), although it had to be adapted for the movie format. For that reason, the ending is completely different and it gives a "proper" closure to the Ichigo and Rukia's storyline (no awful cliffhanger).

I am overall very satisfied with this movie, and I really hope they will make another one!
Except for the ending, it is a fair adaptation of the anime (I haven't read the manga, so I can't compare).
If you are a Bleach fan, I do recommend watching it! Just remember it's a one-movie format (so far), so they had to make a story adapted to that format. Keep your mind open and enjoy our beautiful Sota as ichigo ^^