I remember trying Dave's insanity sauce back when I was seriously into hot food. Hated it. Super hot sure, but it tasted awful! What's the point if it's just hot? In any case, you can be assured that you're tastes and perceptions will change the more you use these sauces.
I tried the Dave's and a few of the other "el scorcho" type sauces at a food trade show I attended a few years back. Didn't really eat it, put a dab on a toothpick, and tasted. Dave's was vile. The others, that i don't recall had some decent flavor, but the heat was overwhelming where it was just not enjoyable.