I never really needed extra volume in my hair, mostly because of how it was cut and styled but as I grow out my hair( and a bad haircut) my hair really needs it.
I've used Infusium 23 in the past and always liked it a lot. I hadn't bought it in a while and saw it on sale so I figured why not give it a try. I thought it worked really well, my hair had great volume and looked great. There really isn't much else to say, I think it's a great product and it's very effective. I would buy it again, even if it wasn't on sale.