What do you think of Sunsilk, L'Oreal, Herbal Essences, and Pantene? (those are the ones I use most often) Or do you know of something that nourishes and moisturizes well that you would like to reccommend?

I have thin hair but it's long, and I usually straighten it every day, so it gets damaged easily and I get split ends, frizziness, and fly-aways a lot.

What about leave-in creams and serums? I am currently using a Sunsilk one in a pink bottle, but I would only rate it maybe a 3 out of 5.

I want to get some opinions so I can find something that will make my hair sleek and soft but not weighed down (which is hard with thin hair).