I use Bragg's CONSTANTLY in place of soy sauce. Mostly, I like the flavor better, it's much mellower than regular soy sauce. Also, I like the ingredient list better. Soybeans and water. Check out the ingredient list on that bottle of kikkoman's sometime. there are many quality soy sauces out there, and as always, its about finding the one you prefer for your own reasons. but a lot of cheaper soy sauces are loaded with sugar, coloring, and other unnecessary ingredients. Also, it is suitable for raw foodists, as it's not cooked.
I just like the stuff!! there's always a big bottle of it in my cupboard!