The price is cheaper than in stores in my country and other webstore deals. I believe it works good, but if you do some research about the chaga nutrition process you may find some information whether those, and other products really are of quality. 1 gram of chaga powder may contain very less of the working antioxidants and bioactive contents that the mushroom offers.
The product only states how much chaga powder there is. I found information regarding markering and it states that if a product doesn't mention anything else than how much chaga it probably hasn't gone through the proper water and alcohol extraction process.
It is hard to say whether it is a good product because of this. Search it up for a better explanation. Like me you probably want a quality product with the super effect it promises.