Roy is tearing it up. His size and explosiveness are rare... I bet he goes earlier than many expect. The ONLY knock on him right now is his durability.
Most analysts are knocking him for his strength and lack of power. Definately more of a speed back than a power back. Which i agree with, he didn't show the ability to break tackles like Burkhead does or
getting low enough to lay a hit for extra yards like Burkhead does and that is what goes against him. He has alot of talent behind him, just needs some time in the NFL to work on his weaknesses.