It's a hilarious show. People say it's a Bleach ripoff, which is totally and unabashedly false. By that logic, Death Note is a Bleach ripoff, too.
BONES is an animation studio, a high-quality animation studio at that. In most shows you see a terribly dramatic drop in animation quality after the first couple episodes, after they've "captured" an audience and the budget goes down. BONES manages to keep the animation at a relatively professional level, even with a lower budget, and it makes me respect them all the more. Plus I enjoy the music.