Doulas

Kellie • We are due with our first March 28th!
I'm giving birth in a hospital/women's center and the Women's specialists I go to has 4 docs, any of the 4 could deliver my baby. This is my first baby. How important is it to have a Doula as well as my docs? What are the pros/cons of a doula? Does insurance typically cover doulas? Please tell me your experiences.