I love this product. I have had thyroid issues for 21 years & then was diagnosed with thyroid cancer in 2013 & had a total thyroidectomy. My eyebrows do not extend far enough toward the center of my face to be aligned with my nostril, like they should. And it's obvious if I don't do my eyebrows. I am very self conscious about it & have considered microblading, but I'm nervous that someone would do them crazy looking & then I would be stuck with them permanently. So...I tried Wunderbrow. I cleaned my face, especially my eyebrows & let them dry. Then I applied the product. My advice is do NOT apply the product using the wand in the tube. You will get too much product piled on your brows & have no control to do feather like strokes to make it look natural. I used an angled eyebrow brush to apply it. I took the wand out with product on it, touched the wand with my eyebrow brush & applied it with soft, light weight strokes. While it was still wet, I then used the spooly (mascara wand) that came with the product to brush my eyebrows. I had no issues at all. I am naturally a fair colored (when I don't have a tan) Caucasian with naturally uncolored VERY dark brown hair & eyebrows (almost black). The "brown/black" color was no where near dark enough for me & the "Jet Black" was closer to what I needed but slightly too drastic & made me resemble the "Mommy Dearest" movie when I have no makeup on (with makeup on, it didn't look quite so extreme). So, I found what was best for me was to put some of each color on a stainless steel makeup mixing plate & made my own color. I needed a color between those two colors & mixing it was perfect. Of course you control the mixed color with how much of each that you use. It does indeed stay on me as they claim. I shower, clean my face in the shower, sleep, sweat & just forget about them and it lasts for days. It is definitely my go to brow product now.