The Adder logo lights up slowly and fades again, just a pulse feature.
The cable is plastic coated, which certainly enhances the protection, makes the cable but also more rigid. Since it is long enough, but you can lie cope.
My next is again a Mouse MX Revolution (or halt successor) be that slides also significantly better because of the much larger sliding surfaces (!) - Weight or not. But is really only for handicaped people and important (if a radio does not interfere) stop but is completely usable without hindrance.