Pro: Voice acting was cool
Pro: Opening, I agree, was nice
Pro: Kamo-kun was really good voice cast
Con: Story was awful
Con: Drawing was badly done
Con: The action scenes weren't very good
Con: No negi sidekick in the form of Kotaru (that's gonna get me kicked by kotaru fans but there you go)
Pro: Action scenes are awesome
Pro: Kotaru, I do think he is a necessity if not a main character
Pro: More artistic licence, the anime seemed cut in places where the manga dared to tread
Pro: The story is going somewhere...
Con: .... I can't work out where.
And negi would have to be done by a girl. That what young ten year old guys sound like...
Imagine if you will a garden with a beautiful blossom tree and a koi pond...
...Next imagine me drowning you in that very koi pond...
That is the power of feng shui...