I'll keep this extremely short like the series should have been...... THE cast and plot drew me in, since I am a sucker for time travel and revenge plots....... and loved the first half .

BUT to be honest the build up was pretty anti-climatic. Without divulging the details the "revenge" is a little misleading , this is more of a 2nd chance kinda story. There is a lot of chaos in the story with vague "logical" travel rules, too many side stories which felt a little forced specially after the introduction of EX......well.....
.....
.....One line "Lost Potential".