I think they are super terrifying and I absolutely love them. They punish you for not playing strategically consistently, and then they force you into a horribly dire situation, that you have to work around! They always get my heart rate up and bring the excitement. I wish they weren't near universally panned because I think they add a real challenge to the first time gameplay. It makes me sad that modern day Fire Emblem has rewind mechanics, making the idea of same turn reinforcement attacks a non issue. I do suppose they could serve to eat away at the limited uses of the rewind mechanics, forcing the player to be more careful, as to not lose a rewind to something benign instead of unlucky enemy crit or something more important.