I buy the $10 grinders and abuse them until something fails and grab another. Still cheaper than buying a high dollar brand and replacing maybe half as often. Have had good luck with the predator engines, 170a mig welder, 60g upright compressor, earthquake impact, 3 generators including the 3500 inverter and tons of hand tools. Their cordless tools were pure garbage, haven't tried any of the newer brands they are carrying but they look a lot better. My hitachi drill and impact is about shot so i might give them a try.
I have a few of their Folding razor blade knives and never had any issue with them, but the first thing i do with a cheap knife is test the lock in a safe manner