First off, If you have not seen Attack on Titan, none of the below will make sense(A LOT HAPPENS VERY FAST IN THIS SHOW).

The new Opening is awesome, as well as the new ending, which I have heard is full of spoilers for the rest of the series.

I was very suprised that Mikasa didn't kill Levi during the court case.

And apparently Eren can regrow a tooth in one hour now. kewl.