Captivating. This show has a lot of moving parts and you need to pay attention or you could easily get lost, however the reward for doing so is so worth it.
A cast that does a spectacular job of owning their characters skins led by an extraordinary performance from Tatiana Maslany, when you get to the point of watching each character and actually forgetting that they are the same person playing a role that is magic that is very rarely seen.
When friends ask for suggestion of what should I watch this is at the top of my go to recommendations.