I am not generally a user of hair products; I love it when they use them at the salon but I never seem to have to money to splash out on them for general use. So I'm not experienced in their use or effectiveness.
The Fibralogy Double Serum is very simple to use. As the instructions state, place a couple of pumps into the palm of your hand and spread through your hair. Wet or dry, it made no difference. And it works - my hair did look visibly fuller.
The disadvantage is that I had to wash my hair the day after use or it had a mind of it's own. So, given I don't have the time to wash my hair daily, I wouldn't use the serum daily. I'm finding I'm using on the occasions I go out to dinner or similar event, but leaving it out of my general weekday routine.
At $11 I definitely plan to replace it when it runs out.
I love the Fibralogy shampoo and conditioner, but wasn't overly exited about adding the serum because I know that most hair serums are too heavy for my very fine hair. My hair looks greasy very easily when I apply serum, even when it is freshly washed. This product added shine without being too heavy and it didn't make my hair look greasy. I find it good especially on the hair ends and I have applied it with very good results on damp and dry hair. I haven't really noticed that my hair look fuller, but it makes my hair shinier and softer. The product has a nice, soft smell. The packaging is eye catching and modern and the pump works beautifully. Very reasonably priced for what is on offer. I will buy this again!
Tips: For best results - use the whole range: Fibralogy shampoo, conditioner and double serum.