Late to this part of the party:
I swear by Kiss My Face olive oil soap! (I have MCS and am allergic to so many things, that I was thrilled to find one that I can use!) It's expensive, but it lasts so much longer than commercial-type bar soaps (Dove, etc.) because it's not whipped up full of air. Unlike commercial bar soap, it doesn't melt away while it sits in the soap dish.
That is so true! The bars last FOREVER!
I just cannot live without it now that I've used it!