I thought it was only for the face, but I give it 100 points for being able to use it on the scalp and everything else!
I found it to be most effective when I used it on my scalp. It felt really cool and my head felt clearer, so I use it frequently by rubbing it on my scalp every day.
I find it a bit stiff to use without massage oil or lotion, so I recommend using a product with it. The sharp fang-like part at the end, not the center, is the most useful.
The handle design is luxurious and the grip feels comfortable in the hand, which is satisfying! Honestly, I've tried Guasha products for a while and put them in a drawer, but this one is working well! I think I'll use it regularly and rub it in from now on!!
I highly recommend Gua Sha as a home care item.