I've had my Bushy for 4 years. I can't remember having had a single issue in function. IMO, that's pretty impressive. It's complete factory parts, no internal mods have been made. I have not run any tough and trying courses with it, i havent slung it in the mud. But it gets used and ignored and, like a good dog, is happy to be handled when i get around to it. Of course now it's worth a bazillion dollars.