I'd say it got all that hype on account of how aniplex re-leased it the first time.
Plus it is a pretty good show.
I think it's sweet that Kyosuke goes through hell'n back all for his sister.
Not terribly realistic, but sweet none the less.
That and once again, Kuroneko kicks ass!
Homura is watching you.
Homura is looking down on you.
And you are loving every minute of it.