Why did you choose to use one? Why not? When did you introduce it to baby? (assuming after breastfeeding has been established.) We didn't use one with DS who is now 2. I ask because we were recently given a gift basket for baby on the way and it had one of these in it http://www.heveababyusa.com/
We were never given one with DS so being given one got me thinking about reasons why and why not to try a pacifier with our second child.