Fortio was inherited from Renault 2112 after 1 season of operation. It survived for another 2 seasons with studs, surprisingly all of them were in place. Besides durability, I'd like to mention quite decent traction, both on a snowdrift and on ice. It brakes a bit worse than accelerates. Course stability is excellent. It makes noise, noise level largely depends on the car's sound insulation. In general, I think it's a solid 4.