To all the people worried about getting a knock off product: I contacted EltaMD directly and Amazon IS an authorized reseller. I would just make sure you're actually buying it from Amazon, not another party and Amazon is just shipping it.
The product is pretty good, doesn't make my face greasy. Unfortunately it doesn't really have any moisturizing benefits so I have to use it with a moisturizer. Also has a faint scent, bot not as bad as other sunscreens.