I finished Charlotte last night, though I suppose it's actually been over for a couple of weeks. I tend to let these things pile up.
It's an anime about a group of high school students that have developed unexplained powers. Each person has their own power, and we quickly learn that by the time they are adults the powers fade away. Otosaka Yu, the main character, is kind of a waste - he uses his ability to take control of someone else's body for 5 seconds to cheat on schoolwork and exact petty revenges against his fellow students. He's found by a group from another school who actively seek out ability users to protect them from government and private groups that attempt to study and exploit them.
I ended up really liking this anime. The story started off with a comedy/adventure feel. It was a kind of "case of the week" thing about the main characters stopping/rescuing/warning one ability user or another. This enjoyable-but-bland feeling was a big part of why I went several weeks without bothering to watch new episodes.
About halfway through, though, things changed drastically. Major events transpired that changed the tone of the story as well as Otosaka Yu's attitude toward his power and his place in the world.
By the end we're taken on an emotional rollercoaster, to a bittersweet but satisfying ending. Definitely worth watching.