It was absolutely amazing. The animation was so good and the effects were off the hook. The music they chose also fitted the different scenes in the episode and they added to the dramatic effect of each. The anime was a bit on the dark side but it fitted it perfectly. And their sticking to the dialogue in the manga is what makes it even better.
The only problem I have with it is that I sometimes hear Tamaki instead of Light and the picture of Light when they were mentioning the sponsors at the start of the episode kind of bothers me. But those are just minor things that can be shrugged off.