What are your personal experiences with a doula?

Lorena • Had our baby girl! Ophelia Jean Rose came into the world Nov. 28, 2015!
Did you like her? Was she helpful? Do you feel like you would have had the same treatment without her? What did she do exactly? I was doing some research, and my husband started freaking out because he didn't like the idea of a doula. When I asked why he said because he didn't want some random person. Ummm my doctor is some random person and the first time I met him was 5 weeks ago and he stuck a probe up my hooha. Anyway. I'm not sure I want one, but I wanted more information before I discussed it with my husband any further. I don't want a medicated birth, c-section, or the such. I want to do it as natural as I can as long as there are no complications. I want what is best for me and my baby. I'm only 12w, so I have some time to decide.