I'm impressed
Since Vit C does not age well in the bottle (I drifted away from skinceuticals CE Feurulic and by the time I went back to the bottle, the stuff was syrup-y dark)  So powder makes some sense.  I have been impressed at how easy it is to use - I just tap it into my palm and add whatever serum I have around.  I think the tingle/slight burn is "good" - tells me the product is settling into my dermis. I am particularly impressed because in past couple of weeks - after 9months of using - I realized my dark brown spots on my jaw are barely noticeable. That is HUGE!
Rating: 5 stars