Washing my hair 4 times/week, and having long hair the shampoo bottle doesn't last long, and it's a real budget !! I was using John Frieda's brilliant brunette at 12$ the bottle and also Kerastase.....definitely making the shampoo experience more pleasurable BUT so expensive !! So do you think there is much difference for your hair using the basic shampoo for family from your drugstore at 2-3$ the bottle ?? I would still use my usual after shampoo serum for protection and shiny hair (Leonor Greyl-excellent).... Thanks for any input !