I have to admit that I have spent a few thousand dollars at Harbor Feight over the past 20+ years. Overall, I am very pleased with my purchases. I am very selective as to what items I purchase from them. They do sell some very low quality items, but they also have some extremely good values in good quality items.
All their "hand tools" now have "lifetime warranties". I have never needed to use this. I generally buy their higher-priced hand tools and impact type sockets. They do tend to fit nuts/bolts a little looser than my craftsman or snap-on wrenches but seem at least as strong as, and actually more comfortable to use than the craftsman. I have never broken an HF wrench. Their better screwdrivers seem to hold up better than my craftsmen drivers.
The only item I have ever returned to them was a defective "long-frame" floor jack. The replacement jack and an identical jack purchased latter are each more than five years old now and both still work flawlessly. The return process was the easiest I have ever experieced - I walked in the store and told the clerk that I had a defective jack outside in my truck. She asked for a description of the jack and the problem. She picked up a phone, had a guy in the back bring out a new jack, rang it up as a "warranty", had the guy help me load it in my truck and bring the old jack back inside (I didn't even have to go back in the store with him). I have witnessed several customers returning the cheap electric power tools, and have never heard a single question asked of that customer, just "lay that one here, and go get a new one".
If I were making a living with these tools, I might prefer more expensive versions of frequently used items. For my purposes, HF is my first choice for most items.