My holy grail has always been the Dior mascara primer... but spending $30 kills me. I am not going to lie this basically $5 lash primer does the same thing!!!!  It does come out white so you can just use a eyebrow brush to take the white, clumps if that's what you want to call it, off. But otherwise its amazing with waterproof mascaras. For that price, its worth a try. 

Pro's= Holds curl and volume w/ mascara, no scent, price is amazing.  

Con's= There's white goo-ey stuff, but it brushes out easily. 

Such a very good coat for my eyelashes... 

fine but nothing special

If you want to have super long lashes then this is the product for you. It doesn't give your lashes too much volume but it lengthen it a lot. You have to be careful while applying it because it can be messy but I do reccomend it.