I think the point with the Diva has to do with size, since it only comes in one size. It might be too large for a woman who's never birthed a child. Diaphrams are custom sized. . .unlike menstrual cups.

I use the Instead during my cycle if we want to have s*x. It says on the box, that it is NOT a contraceptive. . .but, if I'm on my period, the odds of getting pregnant are LOWER than normal, AND I have a barrier in place (the Instead). I don't sweat it too much.

I liked the Instead a lot b/c of it's shape and simplicity. Getting used to the Luna took a little time, with the stem and all. and the stem is there b/c the Luna, the Moon, the Diva are ALL shaped like trumpet mouthpieces. There is not "hooking your finger" b/c there isn't a place to do that. You grab the stem, pull gently. . .like a string on a tampon.