Yes, but MS mice have like a lifetime warranty. True, I've killed a few IntelliMouse Explorers, but every time one flakes out, I can just call MS tech support and they'll send a new one (I actually have an IntelliMouse Explorer 3.0 here that I need to swap with my normal IntelliMouse Explorer whose back button is screwed up... so they upgraded me for free). And when they're not flaked out, they're nice...