I trust my hairstylist. She's consistant. Her own hair is very nice. When she asked what shampoo I use, I told her the truth: cheap stuff. Three dollar-ish cheap. She suggested that I try some fancy (read: expensive) shampoo and conditioner. She said my hair would be softer and shinier. The shinier got me. I figured I'd give it a try. Most likely there would be no difference and I could go back to cheap.
I tried the shampoo and conditioner this morning. My hair is softer. My hair is shinier. So soft. So shiny. This is not good for the cash flow.