For a product that costs so little (less than $1 ...
For a product that costs so little (less than $1 per application), it can make a huge difference.  I am a brunette with eyebrows that are naturally medium brown, so I didn't expect it to have a big effect, but I was pleasantly surprised.  The tint darkened my brows and made them appear thicker while also looking completely natural.  By dying the lighter-colored hairs above my brow, it also seemed to raise my arches.  The only downside to the product is that it will temporarily dye the skin underneath your brow which isn't a flattering look, but I was able to remove the staining with [[ASIN:B00DL77W0A Almay Oil Free Gentle Eye Makeup Remover Pads 120 Ct]].
Rating: 5 stars