If you have sensitive hair, or your beard takes a beating day to day, it may dry your hair out. I found it dried out my beard too much, but smells good, and did not bother my skin. Another reviewer mentioned they had a similar experience but then used the remaining bar as regular soap. That's currently what I'm doing, and while you may not get the true lather of a glycerin soap, you do get the clean skin feeling.
Was worth a shot, but I will stick to a good shampoo and conditioner as needed, and the thicket oil daily.