This is the ultimate eye primer for me. I've tried Paula Dorf, MAC paints, Benefit FYE, but this beats them all. PD and Benefit did *nothing* for me in terms of holding e/s in place (and my eye lids aren't even oily), the neutral MAC paints shades make all the e/s on top look ashy and mute the shade, so I usually use the coloured shades that match the e/s look I apply on top.
Now the UD PP doesn't mute the powder or cream e/s on top and keeps everything in place. Powders are easy to blend on top if you don't apply too much product. All I wish for!! The packaging isn't too practical, it comes in a lilac genie-bottle. Be aware that you only use a VERY TINY amount, usually the little product that comes out when you pull out the applicator is sufficient for both eyes. I apply what's on the wand to my finger and blend this into my lid. If you use too much then e/s will be hard to blend on top and it might end up creasing. I've used my PP for more than 6 months now and there is still product left. Some ingenious person on MUA found that if you pull off the little white plastic ring in the opening you can get every last drop of product out of the bottle even when you think it's empty already.
I'll definitely repurchase this thing and again, it's one of the most important items in my makeup stash and gets used almost every day. It keeps almost everything in place (like Stila eye pots and other tricky cream e/s). It's probably the very best product I've bought in the past year.