As a fabricator id like to say that this company is very reasonable in terms of quality. And considering prices, they are great. We use all major brands and all of them have some minor issues. But what's important is that KStone will fix the issues, if they are not a result of misuse of course.
We always educate our clients that quartz is strong but not bulletproof. We find that warranty is a big problem because it covers defects, but we are expected to fix all other issues such as physical damage. If there is a real defect in stone, KStone will take care of this, unlike some other manufacturers (even more reputable). As long as they maintain good service and quality, we’ll keep using them.