I do like straightening my hair, although it's thin, it's slightly wavy but not in an unruly way. When I wear my hair down it just looks and feels so much better when it's straightened. I like the sprays that are heat activated that you use before using the iron.
When I don't have time to straighten it, I like to use this just to make sure it stays down and makes it easier to brush.
It's a clear, thick serum like all the others. I used to have something similar from Fekkai but they don't have that here, and it was a teeny bottle. This one is huge, 5 ounces, and it's not very expensive, but it is really effective for keeping away frizz and flyaways. Just to be clear, it doesn't straighten it though, but it does make it smoother.