Because you aren't going to like it. I know I would dislike it if I hadn't watched several animes beforehand, at least there are no unlikable characters. The plot is confusing, kind of, and whereas it is good, it's definitely not the greatest thing ever, except for the animation.
You liked Madoka, which I think isn't entry level, but this is like light years from entry level in my opinion.
"Would you please let me join your p-p-party?
G'night ponies. \o