I've had several Losi trucks, buggies, and 4wds to include a XXX4G+ most recently. I've never had any issues with their kits. They are great products, like the 501X, MR4BX, and B44 that I also assembled and own. In fact, I'm not sure why more people aren't running them. The XXX series has always been extremely competitive. Bottom line, Losi makes great stuff.