This is one of my favorite lash primers: only Dior's lash primer serum can beat it. I get serious length, thickness and increased wear whenever I apply this under my mascara. For the best results, you need to comb the primer to separate the lashes, then immediately apply mascara, so you should do one eye at a time: primer, than mascara. It works well under any type of mascara--in fact, the white primer can help colored mascaras really stand out. Removing it can be tough whether using regular or waterproof mascara on top--I have to let oil/makeup remover sit on the lashes for a minute to break it down so it'll come off. The cost is a bit high but worth it.

I bought this products when my Origins lash primer ran out, which I loved. I always like something new so I wanted to try this. It is very thick and you have to apply mascara right after you apply. I found that since a lot comes off, I had to wipe the brush onto the opening of the container to get some off or else you will see the white residue. This dosent really work well with all mascaras, but it does work well with ones that give more thickness, and if you want length, apply it like a mascara then when applying mascara, get the very tip of your lashes, they will lengthen. Also, make sure you get this product at the base of your lashes for full satisfaction!

This primer is awful. I'm pretty sure that mine was used in the store by someone, even though it was in the packaging. Besides that, it makes your eyelashes totally white, which is NOT attractive. It is sooooooooo hard to cover up all of that white with mascara, especially since the formula is so wet. If it was clear, that would be a different story. This is going back to Sephora. What a waste of my $20!

I Love this Primer! I find it amazing as long as you apply a very thin coat of it on your lashes... and very quickly after apply your mascara! You have to make sure your mascara is very black and not grey tinge... a way you can do this is either to put some on a white surface and put a very very black paint next to it and a grey tinged black paint next to it and see what one it is more similar to! Or if it has a name make sure it is called something like blackest black or jet black not black/brown... It tends to work better with either UD products or high end products... no Miss Sporty or Ulta... I love it and really need to purchase another soon since i am running out!

I'm on my third tube of this primer and still really like it. It makes my lashes look like fake ones, but not too over the top. I usually only apply one coat of the primer and then immediately apply mascara afterwards; I've found this method to bring the best results. If I wait to apply my mascara I find my lashes tend to clump. If I apply more than one coat of primer, I find it harder to hide the whiteness of the primer on my lashes. The one issue I have with this product is that a lot of primer tends to come out on the brush when I pull it out of the tube; you have to make sure you scrape the excess product off of the brush before applying it to your lashes, or your lashes will stick together and appear clumpy. Otherwise, I think this lash primer is great and will likely continue to buy it. I've also used Clinique, Lancome, and MAC's lash primers and like the UD one much better, as it actually makes a significant difference in the appearance of my lashes.

I find that this works best when I don't wait too long between applying the primer and then applying mascara. I have never had a problem with the white showing through. It adds extra volume and fullness to my regular mascara. I have used it with a variety of mascaras and found it to work best with high end mascaras (BeneFit Bad Gal, Clinique, Estee Lauder) as opposed to CoverGirl, Ulta, etc. I think that probably says more about the mascara quality than the primer though.

I love this primer! It makes my lashes look 100% better. My only issue with all mascara primers is that they don't make them in black--only white so you have to add mascara on those days you don't really need it.

Very clumpy, and the white color is hard to completely cover with mascara over top. If it were more transparent, it would not be as bad.

Dried out my eyelashes with no added volume or length. Worst primer ever!

At first, I didn't like this product at all, because I would apply the primer and immediately apply mascara causing a huge clumpy mess. The trick is to apply a coat of it, wait at least 30-45 seconds and then on to the mascara. Unfortunately, I have used other mascara's in the past that give me the same result by themselves then with the primer addition. Overall, it's an alright make up product, but I wouldn't purchase it again.