So I used to use the Smashbox Hydrating Undereye Primer, but wanted to find a cheaper alternative to it. I bought this one, on a whim, and actually tested each undereye primer (ELF under one eye, Smashbox under the other) for 5 days, and I found that the ELF one is actually a bit better because my concealer stayed in place for way longer on that side of my face :) Since doing that little test, I've repurchased this ELF undereye primer at least 3 or 4 times, and will continue to restock on it when I run out. I usually buy a few at a time, since they're so cheap! Just for reference, I have very dry skin, big pores, and fine lines around my eyes and forehead. I use this primer under my eyes, and on my forehead, and it helps to keep my foundation out of the fine lines, while simultaneously hydrating my skin :)
@Hydrating Under Eye Primer It really keeps my concealer from creasing without drying things out. Without it I’d ALWAYS have creasing and eye product melting down.