I am rating Latisse not worth it - not because it didn't work, but because to me the results don't warrant the cost.
I tried it for a couple of months, and it did make my lashes grow. I noticed a difference about 7 or 8 weeks into using it twice a day. I was already on to my second bottle. My lashes did grow, but they just grew in length - they didn't get any thicker. So basically I looked like I had Daddy Longlegs growing out of my eyes. And I still needed to use mascara every day, which I was hoping I could stop. Also I have dry eye and use eye drops frequently, so it was a little inconvenient trying to make sure I didn't use the drops too close to the Latisse.
So anyway I stopped using it and didn't even finish the second bottle, and pretty quickly my eyelashes went back to their normal short stubby length! I'm glad I tried it, but for me it wasn't worth the money.