I'll start by saying that I've read many BAD reviews for this product when it was used as a dry shampoo all over the hair. I, however, have used this product with great results for covering bald spots. I always hated putting my hair up because of those funny-looking baby hairs but a Sephora employee tested the product on me and it got rid of my problem just like that! It's super easy to use, it can get a bit messy so I would recommend wrapping a towel around your hair and wear gloves if you want or carry baby wipes for quick cleaning and that's it.
It does give your hair some volume and it doesn't leave a sticky feeling on your hair. Though it feels slightly stiffer as time goes by. (I suppose that helps with adding volume so it's not too bad)