Like xrayjay, I've had mine (1/2 hp) for so long that I've lost track; must be 13 - 15 years or so.
Had one problem when it was out of warranty; I sent it to them, they fixed it, didn't charge me and shipped it back free (from Michigan to NJ is not cheap for this size package).
I keep wondering when I'll have to replace but, like the Energizer bunny, it keeps on going and going and going. Can't kill it with a stick.
Small wonder they're still guaranteed even if you use it in a pro shop!! (At least it used to be; not sure now that they've been bought by Innovative.)