I had a bad experience with Kai, so I don't buy them. Scissors are fine, but I dislike being charged more for being left handed then for them not to support the product is a no from me. If you do buy Kai, they will not honor any warranty unless you buy them direct so be aware of that.
Mine were defective, I was told by the shop to contact Kai, Kai said they don't honor warranties for Kai on products they don't sell directly, take it up with the shop. This sort of thing is too expensive to mess with, so I don't use the brand now at all. At almost $100 for the scissors, I expect them to honor what they say.