Okay, so here's the deal. This show should've had 5 seasons, not 4. Everything up till the middle point of season 4 is AMAZING. After that, they have really rushed it n made it quite illogical.

The ending is underwhelming. That being said, I would highly recommend u to watch it. The story's just really really good. Certain twists and payoffs are veeeery fascinating. Highly recommended!