I just texturized my hair. I did it because I wanted less frizz. The benefits so far, have been less frizz, and surprisingly less product use. Before I used a leave in (aveda) followed up with a curl enhancer. After relaxing my hair the frizz is gone, so the curls look more defined. Since I was only using product for frizz, I guess it makes sense that I wouldn't now. After cowashing I don't add product at all, or just apply a leave in (avocado butter, its winter time).
My regimen and pics (before and after) are in my fotki.