I.G.
I considered using a birth doula, but the cost was prohibitive for us. I can see how birth doulas can have a really positive role for a woman in labor.
Post-Partum Doula, I don't know... I honestly would never consider leaving my newborn with anybody and I don't know how leaving a baby with a Doula would be any different than leaving her with any other sitter. I guess I could see how a single mom, or one whose husband isn't around could use a PP-Doula to catch a break and take a shower during those first days.
This may just be me being weird, but when I first had my baby, I did NOT want any "help" with her. I loved holding and taking care of her and had a hard time even giving her to my DH while I showered. When we were first ready to go out without her she was 7 months old and stayed with my mom... no need paying a PP-doula for that.
A housekeeper who cleans, does the dishes and the laundry now that I think would be useful...