I was a bit hesitant to order this but now I regret that I ordered only two ampoules. I have short hair so I actually didn't have to use a whole ampoule at once but people with long hair will need at least one per home treatment session. I used this after washing my hair while still being a bit damp. It has a nice fragrance and I did notice a glow. Hopefully it also made my hair stronger. Willing to buy this again as it feels nice to add a product, that you would normally use in a salon, to your haircare routine .