Just finished eppy 4. IMO it wasn't as good as the previous two, but the ending completely made up for it -- it was super duper great.
Aaaand, I'd feel bad spoiling it, so you all have to go watch it for yourselves.
I like how in the very last second of each episode it leaves a huge cliffhanger; the problems in each episode get solved, but at the very end they put something else in just to keep you in suspense. Haha, so evil. XD
Ah, I also want to mention that I like Sars so much. ;_; They're so fast and there aren't many errors (I think I've only seen two or three) considering each episode is about forty minutes.