The two life sentences come as a surprise to exactly nobody. The judge pretty much had no choice. Anything else would have been political suicide (except the death penalty, which was not an option).
Elizabeth Smart spoke out at the sentencing and to the media later, saying she was glad it was over, etc., and telling Mitchell she was having a wonderful life, no thanks to him. Mitchell did what he usually does, which is sit and sing hymns. I reckon Elizabeth didn’t much care what he had to say in any case.