I still use disposables at night, and when DD has a rash so that I can put zinc based cream on. I know you can use a liner in an MCN for creams, but I just find it easier for the short term to use a disposable.

Like Raven, I also worry about the crystals, so try not to use them too much these days. I'm even working my way into night nappies for this reason, but that has been a slow process for us. DD seems to sleep better in a disposable.

I didn't know about MCN when DD was born, but I love them so much now that I'll be trying everything I can get my hands on to make sure #2 is in cloth from birth.

To me, it's kind of like paper plates vs. china - sometimes it's just convenient.