It works really well
I'm impressed at how well this works.  I've tried several natural deodorants and I had a hard time finding one that worked for me.  Plus, I need baking soda free because the baking soda was causing me to breakout.  I found another brand that worked, but it was way too much plastic waste.  Everything I've tried from Ethique works well and the zero waste is incredible.  My only downside is I wish they offered a holder that would allow me to add the bar and then push up from the bottom to apply.  Holding the bar on it's own can be difficult.  For now, I haven't found anything that works as well and is as eco-friendly as Ethique.
Rating: 4 stars