I love my slash 4x4. I have had motor problems, esc problems, and the servo went bad in less then a month, but Traxxas replaced all those, no questions asked. Traxxas has great customer satisfaction and I am very pleased with them. As for the truck, I havent had anything broke, but I have also upgraded to Alum front and rear hubs, RPM A arms, MIP Shafts, Center Diff. I use mine just for racing though. I havent had the center diff bearing problem yet that I have heard of but my next upgrade is gonna be boca bearing for it. Hope this helps.