I have one each of their three different "brands" of angle grinders. Three different price tags. And I can tell there is a quality increase in each. The really cheap drill master, of which I actually bought two, had the lock button fall out after I used it for about 15 minutes. The middle of the road Chicago electric one is a work horse that I've been using for 4 years. And the top-o-da-line Hercules, which I bought after returning the one broken drill master, is a beast. It's really powerfull and sturdy feeling. However I don't thing the thumb operated power switch will last. I much prefer the, i guess it's called a paddle switch on the chicago electric.
I've had a total of seven torque wrenches from Harbor freight, craftsman and tekton fail in the last 5 years. The craftsman $50 ones (that's was the sale price 2 years ago) failed the fastest. Literally used them once before then ended up in the trash. Not sure what the moral of my story is though, but hopefully those new torque wrenches are better than some of the other ones out there.