I have used better primers than this one. I bought it some time ago, tried it once and didn't like the texture. It's very greasy (even using a tiny little bit), hard to apply, it creases, and didn't make my eyeshadow last longer. It did make them pop and vibrant but that was not what I was looking for.
I've never had a problem with creasing like some people have stated and the colors tend to be more vibrant when I use this. Overally I'm definitely satisfied with the product.
This product isn't as bad as these people are saying, i use this every day, i dont get any creasing, and i get no oily stuff on my brush,
i think some people just dont know how to use it, you dont use much of this product, it should not be all oily on your eyelid, if it is then you've used to much. and when you apply the eye dust over the top, you should pat it on before you brush it on, then you wont get the primer all over your brush.
This isn't that great of an eye base. It's too hard in the jar, vaseline is much easier to apply than this. I took a toothpick to stir it around but then it dried up again and got hard. It does crease your eye shadows so I don't really used this much. It's good for the glitter though. It does make the colors more vibrant, but I'll stick to my NYX Milk and MUFE no. 10 to make the colors pop and not crease as much.
This primer is great at making eyeshadow colors look very vibrant. However, it has creased every time I have used it. You only need a wee bit. It's a pain to get the product out of the little jar, though. I find this primer to have a similar effect as Vaseline does as a primer, so I would not buy this again.
EDIT: I used this primer again a week ago and it didn't crease as much. However, there was a random streak where the eyeshadow would not layer on above the crease on each eye. The shadows go on patchy when you use this primer. :( Still made the colors nice and vibrant.