This is an amazing series! I love the anime adaptation, though it takes a lighter tone than the manga and tends to have some extra filler episodes.
This was a fun version of the story with a great cast and adorable price.
If you haven't heard of D. Gray man it's kind of like if Blue Exorcist and Fullmetal Alchemist had a love child. It's beautiful and a great story through and through.
The manga is still ongoing but I think the anime (all three seasons of it) do a good job with wrapping things up and staying Canon and open for another series.
Highly recommend this to you!
If you love the manga, you will love the anime. It is very funny and full of action. I can watch the whole series over and over again when you obviously complete the seasons collection. But it is worth the buy.