What are your thoughts about the cry it out method to sleep train babies?

I think that it is a terrible method. The only reason why it might work for a night or 2 is that the baby is totally exhausted from all the crying and screaming for help and attention and comfort and no one is coming to his/her rescue. Whichever method u have been using, and then to suddenly one night just dump the baby to cry to sleep - that's a very abrupt and hard change