Before I began working on my own cars, I let Firestone Autocare replace a belt in my BMW. I drove 20 miles before my battery was dead. After coughing up $250 for a new battery and returning to Firestone, they replaced the belt, and apologized. I drove away watching the charge on my new battery drop (there is a setting in the computer for this purpose), and took it to my BMW guy. Firestone had installed the alternator belt upside down both times, causing the first battery to hose itself. After contacting the Firestone corporate office, they cut me a check for the new battery, and the BMW shop repair fees. They handled the situation well, but I'll be damned if I ever take my vehicles to them again for anything but tires.
Moral of the story: If KAI isn't pleasing you, cut your losses, sell the dang thing, and buy a knife that makes you happy. I'm not a fan of KAI, but at this point, they've done right in my book. Move on to bigger and better things.