I use a surprising amount of epoxy, and JB Kwik is my default. Granted, I don't usually need the super-strength of the original product, so whatever the strength of it is, it's always held up fine for my applications. I appreciate the fast cure time so that I don't have to wait around for hours, which is why I prefer it. If you need maximum strength, use the original (which is what I do on those few occasions that it's necessary), but for most jobs, Kwik works great.