This is probably the only shampoo I'll ever buy for the rest of my life. I purchased this at Marshalls for around $20 for a huge bottle that lasts me on average 6-8 months depending on how frequently I wash my hair. At first I hated this shampoo because I felt like it made my hair oily, but I kept on using it and now my hair can go 3-4 days without it looking too bad. My hair is so much shinier and bouncy when I use this, I never actually knew that a shampoo could make such a difference. For a sulfate free shampoo it has a great lather, and my hair feels squeaky clean afterwards.