Redkin products...LOVE them. My absolute favorite is Smooth Down. It is AWESOME for wavy hair that tends to get frizzy. I actually have used MANY Redkin products and love them all.
I used to buy cheap stuff for my hair, thinking that it didn't really matter. But once I started spending more on the products, I found that my hair looks SOOOO much better. It looks healthier, not frizzy at all, smoother, and shinier. I am SURE cheaper stuff works well for many, but for me, it is salon products all the way.