I've recently discovered that my thick hair was starting to fall out around the bangs area.  Through the tears I decided to try different products to see which was the best for me.  I tried tinted dry shampoo, root touch up spray and Toppik.  The root touch up spray was just ok, I felt that I had to spray paint on my head.  It does cover grays roots very well!  Tinted dry shampoo was better and passable,  I did't like the feel of it though plus you have to brush a lot of the dust out. Toppik was my favorite of the 3 by far.  It covered well and blended in nicely with my hair color.  This is what I'll be using!