I checked it out, too, but I am not convinced on the Stackers, anyway. Seems to me to be a huge rip-off of the good thing Spellbinders has going, minus one big selling point: the ability to look through the die to see your stamped image for easy placement. It looks like they have a placement tool, but that's just one more step. Add to that the higher price, and I'm just not impressed with these, they are the same as the first generation of Nesties...
Now, if I had a need for it, the Ultimate German Shepherd die
is pretty impressive. I like that you can buy just one die, and their shipping and handling is very reasonable. So maybe if I had a need for a dog die...