Harbor Freight, oh how I love to be tortured by them.
They do sell some (key word "some") good stuff, but you NEED to buy the 2yr warranty on ANYTHING power tool that they offer it on. Trust me, best insurance ever!
As or their stuff, some is great, some good, some horrible. I have a ton of their clamps, and while they aren't awesome, they do work, though some you need to watch the pressure or you will bend them. For the price though, they do real well. I have "adjusted" some of mine with a grinder and a file on the clamping pads to get them closer to parallel, but no big deal.
I also have their 12" sliding miter saw and have nothing but praise for it. I went through it and tuned it up real well when I bought, built a nice table for it and added a really sweet blade from Integra Precision (best blades on the market, PERIOD.) and another from Freud, and the thing cuts so dead nuts I can see my table-saw and Incra miter gauge get jealous!
I also have 2 of their lathes, the 5 speed mini lathe, which is just a sweet little machine that also has a nice duplicator set-up on it for cutting pens and other small "kit" turnings, and their 12"X36" swivel head lathe. I did have a few issues with the motor and belts on the big lathe, but they were real good about sending me a ton of new parts (pulleys, belts, new motor, etc.) and although the original motor got super hot after 45 minutes or so, it runs my 12" band-saw really well.
So in all, I have had good luck with them more often than not, and I plan to continue to do business with them. Especially when they carry something I need and I can't afford the big name stuff.
I will say, if it wasn't for HF tools, I wouldn't have several power tools that I love and really couldn't do without, as I just can't afford the big names in those areas.
PS: I also have their metal detector "wand", and it's worth every penny and then some! I tested mine side by side with my buddies "Little Wizard", and my HF detector won hands down.