I did purchase this kit when it was first offered, and I have been using it almost exclusively for hair care over the past couple of months. The only exception has been a couple of times in the shower when it wasn't really handy and I used Suave with Argan Oil (which I also like).
I bought this because I am older and in some places I noticed what I believed to be a little thinning out- nothing that anyone other than me would notice. Primarily in the part of my hair, which seemed a little wider than it once was. Hair is white, relatively short, and very fine.
I am convinced that over the past few days I have noticed a significant reduction in the size, or perhaps I should say width, of my part. That's the only place I really use the treatment spray, but I do use the shampoo, conditioner, and hair spray. I believe it takes a minimum of two to three months to notice any changes.
Has it helped? Yes, I believe it has. My hair has not dried out from the use of this product. It may be because I have used the Suave two or three times, and I think that adds a bit of oil back in. But I plan to continue using it. I haven't seen anything negative, and I truly believe I am beginning to see a positive change.