DD would not take one at all, 6 different types and just refused. But this week she decided she wanted to suck one and I think it is because she has a cold and her ears hurt.
For me I just want her to stop screaming and I don't want her to be on my boob 24hrs a day. But now she finally has taken one I don't want her to have it! LOL. I want her to go to bed without sucking...

It does help settle her though