The characters were cute and funny as hell (espeically sucy and constanze). To me the story was just alright, but it is a kids' anime so I was not expecting something really all that mature anyway.
Maybe if I didn't get spoiled so bad I would've enjoyed it more but it was still great nonetheless.
Also I totally ship Akko and Diana.
Anyway, I really recommend this anime if you like cute witches. If you have Netflix you can watch it there.