I enjoyed this, but...well, the only thing that it has going for it is that the story isn't the sort of thing you'd see in a magical girl anime. It wasn't a very good story...after that initial episode three shock, it was very, VERY easy to see where it was going to go with the whole witch dynamic, etc. I didn't like half the cast, either...I just don't see the appeal in Sayaka or Sakura, and I certainly don't see why people ship them. Homura I liked in hindsight, though, and the only reason I watched the show to begin with was because I liked Mami. xD
I'm looking forward to the movies, somewhat. The one that will have new content, anyway; I'm really not keen on "clip show" anime movies; they cut so much out that you're essentially watching the series all over again without the character development. But extended battle scenes would be nice, as would some additional scenes to tie things up a bit.
Oh, and the soundtrack for this was INCREDIBLE. Yuki Kajiura at her finest, in my opinion. I've always been a bit hit-or-miss with her work, but this was definitely in the former category. Not the best I've heard in anime, but amongst the best~