There are few times I agree with somebody getting off due to an insanity plea. However, there has to be some deeper seeded problem if you kill your kids, in no way try to cover it up, and there was never any possible benefit to doing so.
It would be different if she killed her husband, received a large amount of money via an insurance policy, and months later, police, working an anonymous tip, found the body buried in the backyard...
I think this is one of the few cases where the judicial system got it right. Hopefully, they keep her in an institution for the rest of her life, where she is allowed to yell at demons all day long.