When I first bought this I was somewhat skeptical about the reviews I read. It sounded like every other lash growing product... I also had a slight reaction to the serum when I first started using it, which almost made me stop using it (it could be because I have a sensitive skin). Despite the reaction, I continued using the fLash serum thinking I bought it so I might as well use it though I might not buy another one next time. By about 2nd week of using it my eyelids stopped reacting to the serum, which was great.
I took a photo of day 1 and then 5 weeks later I took another photo to compare and see if there has been any growth. I must say - it works. My lashes grew. I am quite impressed. Once I finish my first serum I will most likely go back and buy another one to maintain my lashes.
This product is great for brows as well as lashes. I've always had sparse brows (not from over plucking - just born that way!) which are not getting any better with age, and flash Eyelash Serum gives me a bit more to work with. Only downside is once I stop using it the growth stops too and it's not a cheap product.
Tips: Shop around, my last purchase of flash was under $40 at Chemist Warehouse (on special)