I wouldn't normally purchase an eyeshadow primer as I just use my MAC prolongwear concealer as an eye primer but when this came free with my NAKED palette I obviouly had to try it out.
It is such a great product and I think that it definitely helps with making your eye shadow last throughout the day without creasing or smudging.
It is a really smooth formula and very easy to apply onto your lids
I got a sample of these when I got the Naked3 palette and oh my goodness are they awesome!
Not only does a little go a long, long way (the samples I got were quite small but that was almost two months ago and none of them have dried up or been completely used), but they hold eyeshadow like no other!
Their original formula is still my favourite by far, it's ideal for every occasion but I really like that they have a variety.
The consistency is the same for all of them. The ones with a shimmer are fantastic for eyeshadows that have a similar shimmer in them, just makes them pack more punch.
I still find though that I need to keep my eyelids closed for about a half a minute to let the primer dry (damn those hooded lids!) but once they're dry, they ain't going nowhere!
I do find that the UD eyeshadows stick a lot better (coincidence?) than my other eyeshadows I put on top.
Tips: The primers with a shimmer (from memory they're Eden and Sin), they are ideal for shimmer eyeshadows, they make your look so much more effective.