Left my hair feeling and looking way too greasy. Plus, I found it hard to wash out. I had to put the water really hot to wash it out. And it stinks...

I got this as a sample pack a while back, and I wasn't super impressed with it. I've used other keratin products and found this to smell awful and not work great in my hair, almost leaving it greasy looking without actually being greasy. However, I can imagine on thicker, darker hair this may look a lot better and work effectively, so for that, I can only state my opinions and not speak for all hair types.

the tresemme line has siginificantly improved. The price can not be beat for the quality of hair care products.

The serum in combination with the hairspray, shampoo, and conditioner in the keratin smooth hair line leaves your hair feeling smooth for several days.

The serum, just a very small amount ( so does not over power your hair leaving it oily) leaves it smooth, no fly aways, relaxed, silky, beautiful. The smell is great, very mild but plesant, but the price!!

This serum is extremely effective if you have frizzy, stressed out hair. It smooths without being to heavy or greasy and doesn't have an overpowering scent. It is especially effective when used with all of the Keratin Smooth products in the Tresemme line.

I bought this smoothing serum after failed attempts with other brands and was pleasantly surprised. This serum goes on light and gives me a nice smooth look after blow drying. It doesn't make your hair greasy the next day.

TRESemme Keratin Smooth - Keratin Infusing Serum is a great product for my long hair that gets breakage and frizz near the neckline and ends. Collars rubbing and a natural wave cause a frizzy dryness and this product smooths it all away leaving healthy looking hair.

I've started using this product and I really liked it for it doesn't make my hair feels oily and it tames all the frizz and static from my hair. And it has a great smell too! I always love Tresemme products!