This one is a good watch. I think it is well written. From the first episode up to the last one, the writers managed to keep viewers engaged.

It is a very complex story with lots of characters, each provided with well constructed backstory essential to the main plot. Complex but not convoluted.

At first I feared that I would get tired of the loop redundancy and just drop the show midway. But I didn't. I just got a bit tired in behalf of the characters, seeing they lived through the loop over and over again. Without rest, sleep or even food.

With this kind of genre, it is almost impossible to give a plausible ending. And they did manage to do so. Not only did they managed to right the wrong, but they also managed to give everyone a happy ending that they deserved with a bonus love story on the side.