Just wanted to share my recent experience with Hiya Hiya needles.
I wish I’d never bought them. I love that they turn at the join so they don’t get all twisted up as you knit; however, because they don’t have way to tighten them like my knitpick nickel plated (just ordered the harmony needles for mother’s day for myself) needles do I’ve had them come unscrewed with every single project I’ve used them for.
The customer service also isn’t as good as knipicks. The long cables broke on the very first project I used the Hiya’s Hiya’s for and the company refused to replace it unless I sent it back first. Not a big deal really except when I had the same thing happen with my knitpicks cable they replaced it no questions asked. I also once had a defective needle sent to me (the part where it screws in to the cable didn’t exist ie there was no hole to screw the cable into) and it was also replaced no questions asked. Just a small thing that will keep me using knitpicks and not recommending Hiya Hiya.