
It comes with a nice friendly warning:

And so with fear in my heart, a clear pathway to the bathroom, and a glass of milk handy, I broke one open.
They're formed much like a Hershey's chocolate bar, with the little rectangles formed into it. So I busted off one end of rectangles, broke off a single rectangle and took a bite. That first moment you can tell it's quality chocolate, and not your average super processed bullshit you can get anywhere. The sweats hit you long before you pick up more than a hint of the heat about to wash over you. It's actually a number of seconds before it's anything more than a pleasant tingle on the tongue. Which gives false hope so I popped off another chunk and ate it slowly. Now the heat begins to build, but still remains pleasant enough.
For a few more seconds. The heat doesn't really start pouring on until the chocolate is gone. The capsaicin lingers long after the chocolate flavor fades and gives you the sense that the heat is continuing to build, and build, AND BUILD. It wasn't quite panic inducing, but would be to someone that isn't a heat lover to begin with. It took about half a glass of milk just to knock the edge off of it, and the whole glass before true relief set in.
This is not a "sit and eat the whole thing at once" chocolate bar. I'm thinking it could be a nice addition to a mole sauce that you wanted to have kicked up a notch. Or add a little bit to a nice chili that seems just a touch bland. Broken up into ice cream would probably be pretty cool too.
Highly recommended. Use them to prank friends. Hand them out to those annoying neighbor kids that keep fucking with your dog. Give them to your mom after her latest lecture about what a waste your life is. Or just treat yourself to heat blast chocolate.

WARNING: I'm actually used to a few reaper hot sauces. Anybody that isn't, probably shouldn't bother stepping up to this plate. These bars are way more brutal than any reaper sauce I've tasted.