I bought a kindling cracker as well. The "kindling cracker" brand was going to take too long to ship so I bought a "mighty hand". Let me tell ya, it don't work for sh*t. I put a spilt on it that I would consider small compared to what I see in youtube videos and I beat the crap out of it with a metal mallet, barely even a dent. Now I don't have it mounted to anything yet so I am doing it in the grass, but even then I expected it to work. I am not sure how much of a difference it will make when mounted to something sturdy but I may be sending it back for a refund. I am thinking of going the axe route.
edit: let me know how yours does.