Don't get me wrong, I'm not saying harbor freight impacts are as good as dewalt. I'm saying the spread in quality between dewalt and harbor freight isn't likely as large as we want to think.
I think it's more a function of the fact they are just copying other tools, using crazy cheap labor, cutting out distributors, no corporate bull crap, and let's not forget that they don't need to support a warranty like dewalt for 3 years…just 90 days.
I've never Owned a HF power tool. I have owned dewalt one time and not been impressed with power or durability compared to my Milwaukees that I use daily. The last dewalt I had broke in half, in my hand, at 4pm not only cutting my hand but making me have to come back the next day to finish. I've been sore about it ever since.
That said, surely someone has done comparisons online. That's what the kids like to do these days.
I'd be curious to see how harbor freight stacks against dewalt, craftsman, as well as how each stack against say husky or Ryobi or kobalt.
I've got a Ryobi drill that's 25 years old. Hard to argue against durability on that one.