I can say that i have had nothing but great help from KB. Sometimes they get busy and are hard to get a hold of but they aren't exactly your corner store and im sure have calls coming in as soon as the phone gets put down. Just from my experience, they went out of there way and fixed something i purchased used under warranty, then when i couldnt find a part i needed for the install sent me it for free no questions asked. They gave me a accurate time frame for repair, and kept me updated with the fix.