RevitaLash promises to deliver thicker, longer lashes within weeks. But it's going to cost you, gulp, $150!!! See if our testers thought it was worth the money. 

Pros: My lashes used to be short. Now they're fuller, longer and, overall, healthier. Plus, the tube seems like it'd last a long time.Cons: You have to apply right before bed. If I stayed up, my eyes burned a bit.
—Sarah F., Daily 10

Pros: After 10 days, my lashes weren't necessarily longer but they were definitely thicker.
Cons: My lash line was a little bit lighter, but it's only noticeable close up. Also, if I had to choose between paying $150 for long, natural lashes or just using a good mascara for much less, I'd choose the mascara.
—Rebecca F., E! News Now

Pros: My lashes grew a little bit longer.
Cons: My friends didn't notice a difference at all, so I don't think it's worth $150.
—Emily L., Casting

Bottom Line: One hundred and fifty big ones is way too much to spend on something that's hit-and-miss.