I only buy Harbor Freight if i'm willing to buy a 'disposable' tool.
Harbor Freight also has absolute top, and absolute bottom type quality tools in their store. You either get a great tool for the price, or a big pile of crap. If you get any air or electrical tool, make sure it works right away, if it does, chances are it'll be ok. If it doesn't, take it back and buy the tool elsewhere. I have a toolbox full of harbor freight stuff and most of it is just fine. My chrome sockets are all Craftsman, but my impact aren't. I also have the craftsman thin profile ratchets, they are GREAT! Well, wintertime, now i'm not talking about compression testers anymore, i'm talking about tools in general lol. They're so SHINY!