What are peoples opinions of Ethan?

I feel like Ethan would be one of the more controversial characters in the show in terms of people's reactions to him. Obviously he starts off as a crazy villain who kidnaps and kills people, but in the flashbacks he genuinely seems like a solid guy! He's really kind to Claire and seems like a normal person up until 815s crash.

I assume he had gone insane at one point, switching his emotions constantly and rebelling against the usually negotiable Others. Still I can't help but wish he had survived longer and gotten the redemption arc Ben and in part Juliet had.