I got this off iherb and it was only a few dollars. I really like it I do see my shadows lasting longer with it than without it. I have the shade sheer and it is great for any coloured eyeshadow.
It is nothing amazing but worth it for the price.
My only problem is that it can dry out in the tube quite fast considering I don't wear eyeshadow alot.
I found that this didnt really work for me, it creased my eyeshadow, and did not make it stand out as well as i had expected. I would tell my friends to try it and see if they like it.