I'm no medic, and my training consist of how to use the stuff on myself or one of my partners. The Quick Clot powders (even better is the gauze treated with it) are good and certainly have their application. If you are treating gunshot wounds or something with a large amount of trauma they are very valuable. If you are treating lacerations, they aren't going to offer you much more benefit than you can get from direct pressure. If direct pressure won't stop the bleeding from the laceration, the clotting agents aren't goint to help you much. At that point, it's time to go to a tourniquet.
Make sure you understand what kind of clotting agent products you have. Some of the older ones can cause physical burns and tissue damage. The newer ones do not.