For $7.00 this is a steal. As a primer before mascara it works just as well as Blinc and Clinique. I'm not familiar with other brands of lash primers, so there may be way better ones, but for this price, I think it's great. I read some negative reviews on the NYX website that say this has fibers in it that fall into eyes. The Big & Loud Lash Primer I have does not seem to have any fibers at all. I even squished some on my finger to see if I could feel any fibers, and I didn't feel any. This is a smooth, white cream that looks transparent white on my lashes. I use this on my bottom lashes (occasionally on my top lashes, too). It makes applying mascara to them 100% easier, because the mascara has something to "grip" onto. I don't wind up applying black streaks to skin under my eyes. Also, this really keeps mascara from smudging or flaking, so even if I use "regular" (not tube) mascara, I'm not a disaster after a couple of hours of wear. My eyelashes need all the help they can get, so maybe that's why this seems very effictive to me. It makes a difference in length and width, so my lashes look longer and they're more separated. If you've already got great eyelashes, you probably don't need this extra step, but this primer may also help with smudging, etc. I don't curl my eyelashes with a curler, but I rely on mascara to curl them. This primer is not a curl enhancer. It seems to straighten my lashes a bit, because it weighs them down. However, for my bottom lashes, and for the low low price, I am very happy with this primer.