I don't like the idea of life imprisonment.
Only reason I say this is because life imprisonment seems like a waste. It's clear there's no attempt at/point in rehabilitation if they have life in prison, and if they're aware of their life imprisonment then their only options are die in prison or find some way to get out of prison. (likely illegally, and if they somehow manage to miraculously get out of prison, then they are clearly no longer removed from society. )
All a life sentence would really do is keep our conscience clear that the person is still alive, but their life is basically over anyway.