The drama started on a slow pace which after a while caught quickly and reached real peak of the story around episode 20s which, unfortunately, 'crash landed in the Hudson river'.

The acting were okay except some places as some shot really didn't match the flow. The production was also quite good as they brought out the spot sense. Cast could do slightly better in terms of some characters. Even then they did a great job and I enjoyed most of the drama.
The drama had a great flow of interesting events which later the story's lack or because of the direction they messed it up towards the end. Overall It's very interesting to some extend in the drama.