crying it out.

I'm a FTM and I've read the pros and cons of letting your baby cry it out. I'm looking to other moms for their reasoning behind why they choose to do what they do! I'm not looking to judge anyone I'm just wanting to be open minded. So mamas do you let your littles cry it out or do you pick them up and sooth them! 
Let's try to be civil and respectful of other moms and their choices.