To put a close to this dispute, people that read the manga hate the anime since it deviates from manga story quite a bit in a few points, however I can understand people who loved the anime regardless since it wasn't all that bad, it simply wasn't all that good either, character development was indeed poor but artwork was great, characters were rich already and there were a fair number of plot twists which made up for poor development. However the anime deviated from original in many aspects and that alone was hateworthy. The albino haired girl (forgot her name) was probably the best character, but I still love the OP most. There is far too much censoring in this show, I haven't seen the BD release other than the OP since it's uncensored and it's probably the best part of the show anyway.
The show is good for those that did not read the manga, the show is bad for all else.