DD is about to be 18 months old. We did CIO when she was 7 or so months I believe. It has always worked well at bedtime, but naps are another story. It's a 50/50 chance that she will take naps without crying/fussing. She'll either talk to herself or cry/fuss for up to 15 minutes, then she will go to sleep on her own. I kind of thought she'd stop the crying/fussing by now, but it still continues. I'm just wondering if that's normal or not. Oh... when she does cry, it's a "come get me" kind of cry. I don't leave her in her crib if she's truly upset.
I don't know if this has anything to do with it or not, but my MIL watches her while we are at work. I've told her to just lay her down for her naps, but she refuses. She will not let her cry/fuss. My husband's grandma said she's told her she won't let her cry/fuss. She insists on rocking her to sleep for her naps and that takes a LOT longer to do. I'm wondering if that's contributing to our problem, because we do things two different ways.
Re: For those that did CIO...
Consistency is key, so yes I'd say your MIL and husband's grandma rocking her to sleep and not letting her fuss are probably the reason your DD is still having troubles. I think it's really hard for grandmas to listen to their grandchildren cry! That might be a tough one to get resolved...
"It is better to light a candle than curse the darkness." - Eleanor Roosevelt
I'd talk to grandma about the fact that, although it is hard for her to hear DD cry, she is actually causing more overall trauma for DD by confusing her and not sticking to your routine.