I have been using fLash serum for about a year now and I love it. I have tried others previously but didn't get the results that I get with fLash.
Within about 3 weeks of when I first started using it I noticed the eyelashes looking longer. But as with all hair, the long ones would fall out and the new ones would come through.....so even though they are long for a period, it does then go through a phase of being a bit shorter again, but never fear, they too will grow.
I have noticed that my lashes benefit most having a break, so after every 2 tubes I go through, I give it a rest for a couple of weeks before starting a new one. Unfortunately I find the tubes don't last that long so you do need to keep restocking. Pity they don't make it in a bigger tube with more product in it.
So having had short, Asian eyelashes all my life, I really wanted a chance to grow them so I could "complete" my look with mascara.
I decided on fLash (or Flash Lash) as it was the cheapest option compared to RevitaLash and other alternatives. I bought mine for $40 plus post from Once It.
I have been using it regularly for a month and a half, and I can say that there definitely has been results, though not dramatically so. My eyelashes are slightly longer (about 0.5mm), thicker and they now curl upwards. However, the growth seems to have stopped, so I believe my eyelashes might have reached their maximum length with this product. People with longer eyelashes might have better results.
I believe you get about 2ml (which is a 3 month supply), however, I'm not sure how much is left (the tube is opaque) and I apply it to both my top and bottom lashline. Occasionally, I do feel a bit of a slight burn and itchiness but it passes quickly.
I have also noticed my eyelashes are stronger and don't fall out as easily.
Overall, it is a good product and I believe it does work.
Tips: 1. Apply it as close to your lashline as possible. 2. Only apply it in areas that you wish your lashes to grow. I applied it too close to the inner corners and eyelashes are growing there too, which is a bit annoying as my curler can't reach that area.