I also bought this off iHerb after reading other reviews and seeing it used on Youtube Tutorials and I have to say first impressions was not that great.
I am not a fan of the glitter in it and it doesn't do anything for my dark circles or creases really.
There was also a lot of fall out as its sort of like a talc powder consistency so I ended up with sparkly bits on other areas of my face and the brush that came with it is pathetic to say the least!
At least I tried it and its cheap but not for me. I won't buy it again.
I bought this off iHerb for next to nothing. Bought it after watching the Youtube gurus like Shaaanxo use it in their tutorials. First impression was that it was shockingly small, but good that it comes with a small brush (though I use a bigger brush to cover a larger area).
I am not too sure what makes it special for the undereye area as opposed to the rest of the face, as it is just a translucent powder. It does have quite a bit of glitter in it though, so that does help to brighten up the eye area.
Overall, I am glad I tried it, though it didn't really live up to my expectations so I don't feel I would purchase this again.