I have longish wavy hair that I color occasionally. My hair tends to frizz up and look frazzled out, even though I never use a blow dryer. I have tried a lot of different hair-smoothing products, from shampoos to conditioners to leave-in lotions.
But this stuff! It makes my hair sleek and silky in a way that no over-the-counter stuff I have ever found could. It's not goopy or gel-ly or oily like many anti-frizz products. I think it's silicone-based, so it just slithers onto your hair and then makes it look like a '70s shampoo commercial. (If I also use a straightening wand for special occasions, it looks like "princess hair.")
My hair also feels about 500% softer than it does without it. Not just subtly softer, if you're paying close attention, but like the difference between those new kind of plush toys that have extra-silky fur, compared to the old-fashioned kind of stuffed-animal fur. (I've had guys compliment me on the softness of my hair since I started...