Not used it yet as I've still got product im 3017'ing but as soon as I do its either MdC rose or MdC fougere. My research tells me that these are open cured soaps and this process takes months at a time anyway. Unlike something like an artisan soap I don't think there are any ingredients in the soap that will actually go off or lose any of its properties other than scent. Its supposed to be a very dry, very hard soap. Again I haven't used it but researched the hell out of it because its really expensive, at least in Australia.