"And it was all yellow"

As a latecomer to the "stuff you put on your eyes before makeup" scene, I haven't tried Lemon-Aid from Benefit Cosmetics until recently. This isn't exactly a primer, nor is it a concealer, which is why expectations should not include eliminating dark circles or making makeup last longer. What this product does is take care of red and purple discoloration of the eyelids. It isn't supposed to be used on the under-eye area and doesn't provide coverage or any de-puffing action.

Lemon-Aid is a light yellow cream that has a somewhat waxy textures. It needs to melt a little before patting it on the skin. I know that for some people the texture makes it a bit difficult to use, but I had no problem with application. The tiniest amount is enough to do the promised trick and get rid of the redness. I wouldn't go as far as to say that you don't need eye makeup when wearing it, at least not in my case, because of my naturally dark eyelids, but it provides a good starting point for makeup application, especially for light colors that I sometimes have a problem making them show.

In this sense, it does work the way you'd expect from a primer: Easier application, you need less because shadows spread more evenly and looks better. However, unlike the wonderful Urban Decay eye primer that is a cream-to-powder formula, this waxy product is all cream, which means that sooner or later (two hours in my case) you start seeing creasing, and the makeup doesn't last as long as it should. I tested it with several Dior eye shadows as well as with the Bourjois I reviewed a few days ago. All are very high quality, so the blame isn't on them. Lemon-Aid is just not a primer, and can't be expected to perform like one.

It can be used in combination with a real primer. The question is: Why? I'm as high maintenance as the next beauty blogger, but I don't like loading up my face with layers of products. This is actually why I resisted the primer revolution for as long as I did. I'd rather not use two primers where one is sufficient. Then again, I don't have that big of a problem to cover.
I'd still use Lemon-Aid when I don't need my makeup to hold for a full day and I'm trying to keep things light, but it isn't a must-have as far as I'm concerned.