I love the colour, and it does alter the colour of eyeshadows slightly (say, a blue might lean slightly more green than without this primer) which is the chief reason I bought it. It also can be worn alone with a bit of black eyeliner, just to add a bit of sparkle to the eye area. I've been lazy and have worn that twice this week, haha.
Major downside, for me, is that it's just not as long lasting as I'm used to. My eyeshadow doesn't stay put until I take it off like it does with my Urban Decay Primer Potion (in Eden, in case anyone was wondering) or even with my Elizabeth Arden one (though again, that does crease a little). This doesn't play nice with slightly moisturised eyelids at all (think insta-crease) which is a problem for me as I religiously moisturise all over my face each morning. My eyelids aren't particularly oily but this does have faint creaselines around lunchtime (barely noticeable, but not the flat canvas until the evening I get with my other primers) and by 6pm it's creased. Also, it doesn't 'grab' the shadow and provide a nice, mattified, surface for you to work and blend on - it's actually rather dry? So it doesn't aid application, either.
I like the effect I get from it, but it's not something I'd repurchase. This may just be an issue with this coloured one, though, and not indicative of the texture of the standard Eyelid and Mineral Eyeshadow primers. Not sure. I am going to be fair to it, though, and say that for £1.50, it is pretty damn decent.
Anyone else tried this? How did you feel about it?