3 in 1 Base Top & Strengthener is rated 2.6429 out of 5 by 14.
Rated 1 out of 5 by from Do not purchase this stuff. I am a huge fan of elf cosmetics, but this stuff is so not worth the money (even $2). My nails were chopped and ruined the very next day after using this stuff as a base and a top coat. And it was china glaze color. Do not recommend. 
Date published: 2014-02-19
Rated 3 out of 5 by from It's clear nailpolish. I loved the size of this base-tope-strengthener. Its bigger than their other nail polishes. So I was very excited about that. It does smell a bit different than your regular nail polish/base-top. My nail polish did chip after 2 days... but hey! For the price, that's not bad.
Date published: 2014-01-25
Rated 1 out of 5 by from Chips easily I'm very desapointed by the product . The smell is SO strong and it didn't make my nail polish last at all. The next day, my nails were ruined. This item is a big let down for me because I love all my other ELF products.
Date published: 2014-01-23
Rated 5 out of 5 by from Loved it! Loved the way it quickly dried, it made my nails glossy and helped resist chipping most def a great buy
Date published: 2014-01-22
Rated 5 out of 5 by from Finally! You know a top coat is good when you finish the last nail of a hand to see the rest have dried already. I've been looking for a top coat where you don't have to sit and WAIT for it to dry. And once it's JUST dried, tapping it won't leave any imprint on it either. I just got it so I can't say whether it lives up to its strengthening claims but I say this is worth it.
Date published: 2014-01-11
Rated 5 out of 5 by from Great shine and value I bought this top coat as soon as it was available online. It immediately adds shine to my nail color and seals my polish. It has a smooth finish and is a steal at only $2. Once again, another phenomenal product by e.l.f.!
Date published: 2014-01-11