I absolutely ADORE this product! I have long, thick, unruly hair that is magically transformed with this serum. I use it on wet hair and also once it's dried to tame flyaways and give texture. Additionally, I use it after flat iron usage to make sure my hair is smooth and shiny.
This is weightless and always helps protect my thin/fine & thinning hair from heat styling and straightening iron. I use an amount about the size of a nickel and rub it between my palms to "loosen" and warm the serum before applying. It also helps prevent humidity curling and fuzzies. With Hana, my hairstyle lasts 2 days (probably because it seals the hair cuticle and moisture can't sneak in thus letting kinks set in while I sleep.) I always take it when I travel. If you can avoid it, don't put it near your roots. Just apply to the frizzy parts and ends of hair!
I initially purchased this shine shield with the Hana ceramic flat irons *love them* (I jokingly call them my third child). Now this serum is the only thing I use for my hair. I agree that the price is a little high, but I only need one bottle a year. I've tried countless hair gloss, moisturizing creams, sprays, serums, and this is the best stuff. Great heat protection, shine, and smell. Just for reference--I am black with thick, pass shoulder length hair.