I used for about one year until I hit my hair growth goals last year. I loved having hair to the middle of my back. (I can typically only grow to just below my shoulders.)
I recently cut my hair to get rid of old dye damage and start fresh and began taking DeeplyRooted again. After 3 months, I already see the densification again at my widow's peak and a bunch of new baby hairs at my part, which I needed! Worth the commitment over time for the results!