My Mum is always quite good when it comes to bargains, not sure how she managed to get me two of the GHD Smooth & Finish Serums for the price of one but thank you for introducing me to this! Although I have been blessed with naturally straight hair, I do often get the little flicks and fly aways due to the recent weather and often humidity, but this little beauty helps to maintain the hairs straightness for up to 12 hours if not more. (It may be different on other hair types)
I find the hair becomes extremely soft and shiny, promising to "eliminate frizz and temporary smooth down split ends." Something I feel GHD do best is produce outstanding and high quality hair products, whether that be electronic and like the said product.
The formula is slightly oily, therefore I'd recommend one small pump for fine thin hair, whereas two for thicker hair. Massaging the product in your hand and my top tip would be to even get it between you fingers, finger combing it through the hair whilst avoiding the roots. I tend to focus on the areas that I know are a pain in the arse, like my layers. Like I said, my hair can stay straight for up to 12 hours in some cases more. Definitely one of my go to products, even when I have my hair straight for nights out, no matter if any alcohol gets spilt into my hair (common occurrence) this serum honestly keeps my hair tamed and straight.