I shop at harbor freight all the time. I have a grinder (holding up pretty well so far), a grease gun (it's ok), a vise, and some other tools. I had good luck with most of their tools, except for some minor problems, but for what I paid for them, it's ok. You can't beat their return policy, and deals.

One word of caution is to be careful using HF tools (or anything stamped with a country other than USA) at a DOE site. We just recently took a violation due to a chain binder that was used to secure a ram on one of our excavators during onsite transport because it had suspect counterfeit hardware and there fore was deemed unsafe. This is probably the most extreme I have seen in my years, but be aware. We commonly used HF tools inside areas where rad contamination made the tools a one time use only item.

Yeah, I did try to go cheap on a framing nailer, it lasted for about 30 nails and all of the packing rings blew. I got my money back and got a better one.