So sorry to hear about your difficulties with your needles. I know what a horror that can be!
BUT, the good news is that Knitpicks probably has the absolute BEST customer service I've ever seen. I just called them about a situation with a product and they cheerfully arranged to get me a replacement right out and at no charge.
Not everything works perfectly all the time, but if the company you're dealing with is so willing to take responsibility and replace what's gone wrong then that's a huge bonus.
By the way - the nickel plated options are AWESOME! I don't even knit with anything else nowadays!