Harbor Freight - Gems and Junk

Things to avoid - ANYTHING that depends on hardened, heat treated metal, like drill bits, saw blades, etc. Forget about taps and dies, too.
Most of their die grinders are made with junk electrical switches. I've tossed a few because they would not stay in the ON position. Crummy design. I've also cracked a few housing castings on the die grinders when I engaged the locking pin and spun off the locking disc to change a grinding wheel. Consider them disposable items.
Most of their rechargeable battery items suck - won't hold a charge. One exception was an electric 1/2" impact gun I bought 7-8 years ago. Can't buy a new battery for it now though, and the new 1/2" impacts they sell - they won't sell the batteries separately - go figure.
They have a LOT of planned obsolescence built into their products where they won't sell you the consumables, or make them really expensive or hard to get.
Their hand tools are ok, especially for a junk yard set. I bought one of their monster 3/4" drive socket sets for $40 just to have the sockets to use for pressing seals - you'll never break them. Their Torx bits are ok too.
Stay away from their pop rivets or other fasteners. Electrical or shipping tape does not have enough adhesive on it, and way too thin.
Their house brand welders are junk. And their 'precision' machine tools, like a metal lathe? Try the feed screws and see how sloppy they are - you'll never hold a tenth on one of those junkers. It's a shame because they got 85% of it right, but the really important stuff they gloss over.
I'm on my 2nd blast cabinet - the $200 (on sale) one - don't bother with the table top ones, not big enough to do a head or a steel wheel . I wore out the 1st one. On my 1st floor jack from them - made in china but then so are most of them nowadays, so we'll see. Going there tonight to replace my sun rotted trailer tire covers - canvas with metal hoops sewn into them. Held up pretty well for what they were. Helped preserve the life of my trailer tires from sitting in the sun. Their cheapo Ohm meters haven't let me down, and are cheap enough (even free sometimes) to keep spares wherever I need one. Great for continuity testers when working on an electrical problem.