My son started using Beard Guyz Serum. At this point, he has not noticed that much of a difference in growth. What he has noticed is how soft his beard is. He has some patchy spots, so he's hoping that with continued use, it will somewhat start to fill in. This is his second bottle. It's not a greasy formula, which he definitely loves. Hopefully, the product will meet his needs. He didn't notice any scent and didn't have any skin reactions.