Terrible mascara primer. It took the curl out of my lashes and did not lengthen or thicken. I returned it.

This HAS to be one of the best beauty products they've ever come up with. I can't imagine how this product would have any negative reviews. Unless you don't know how to put make up on correctly, I guarantee you will absolutely LOVE this product! The key is to use a good, fresh mascara...one that you just bought. If you're using an old, clumpy mascara that is over four months old, you may not have AS good results. I simply WILL NOT put mascara on without using this first. Not only does it give me long, thick, false-looking lashes, but it's made to help improve and condition your lashes. What else could I ask for in a single product?

I bought my first Cils Booster a while back and never used it more than twice. I happened to buy one again this fall and can't believe that I've been overlooking this treasure for so long -- what a difference it makes! First of all, I love my Definicils, but Cils Booster lengthens and/or thickens my lashes (depending on how it is applied) AND helps the mascara last longer. I practically have to tug off the mascara at the end of the day (though I found that switching from Clinique to Bi-Facil helped). I think the Cils Booster also helps alleviate my one gripe about my Definicils -- that it tends to flake -- because I had a no-flake day! I had no problem with the Cils Booster formula being white, and found it to help me see which lashes might have gotten skipped by the mascara, actually. I have a light hand when it comes to mascara, but I'll have to try making the faux false lashes look and add to this product review once I've tested that technique!

Got this after seeing all the rave reviews here. I bought the Cils Booster XL, and it makes my lashes glossy, so the fact that it's white doesn't bother me. It fattens my lashes and lengthens them a bit, and somehow I think this holds my curl better. I give it 4 lippies because I found it to be hard to control. Too little and it doesn't make noticable difference, a bit too much and you end up with clumpy lashes.

Just lengthens does not add volume!! Shiseido is way better. This makes mny lashes look very thin. I'll stick to Shiseido.

I love this mascara primer the best of all I've tried. Your lashes stay soft and full under any mascara. Other primers I've used, your lashes get very hard and spiky. Price is average and this lasts a long time. Gives tons of fullness

This *definitly* makes a difference in the appearance of lashes after mascara is applied. Lashes look longer and curled. I've been using 2000 calorie mascara and using one coat instead of 3 that I normally use. This doesn't make black mascaras look grey as far as I can see. Even though the product is white it is undetectable after one coat of mascara is applied. I will be repurchasing this. <3 love it :) continued >>

I have the XL version. It's great and I love it! Makes my L'Extrême mascara even better. When I put it on, it's like I have false eyelashes. You do have to put your regular mascara on top when it's still wet to get the full effect.

Another great Lancome mascara product! This made even cheap drugstore mascara look like false lashes!

I love this product. Admittedly, it's an extra step in the morning, but worth the few seconds it takes.