Madoka was interesting. I would definitely say it's worth the watch. Don't listen to the people who say it's the greatest anime ever made, because it's certainly not perfect. Also, don't listen to the people who say it's just over-hyped garbage, because it's definitely not a bad show, either. The bottom line is that it was handled artistically and the story's compelling enough that it's hard to stop watching it mid-way through. From there, it's all a matter of taste.