Must be on my 3rd tube of this. Definitely helps my eyeshadow stay on longer. How do I know? Well ive trialled it with and without. Without- my eyeshadow creased and faded, though fair enough I went out clubbing. But with it underneath my eyeshadow, there is minimal creasing in the inner corners, otherwise the colour is still as vibrant as when I first applied it. This is after at 8 hours when I get home and check my face in the mirror. I wish my inner corner wouldnt crease, but i think its doing a great job already. I use this approximately 5 days a week, lasts around 3-4 months before I need to buy another one. I like the packaging, I just pull the wand out and apply on both of my eyelids. The amount on the wand is enough for both eyelids. When I have to stick the wand back into the tube for the same application, I know Im running low. Cant say what it would be like for super oily eyelids, I would say my eyelids arent particularly oily. Its a good product, not out of thr world awesome. Im bored of looking for new eye primers so will likely stick to this one until some ground breaking one comes out.