I voted "superb" for one very simple reason. Compared to 2nd edition, d20 just rocks.
Player: "I want to close the distance and attack. How far away is the goblin?"
DM: "I don't know. Too far. It will take you 17 days to close the distance."
Player: "17...?! OK. Can I cast a spell?"
DM: "No. There's a flower in your line of sight."
Player: "What? A flower? OK. Fine. Can I shoot an arrow at him?"
DM: "Yes. But it will take you 5 years to ready your bow and arrow."
Player: "5 years!?! Fine! Can I call for help?"
DM: "Yes. But it will take you 2 rounds."
Player: "What!?! Two rounds to speak!?!"
DM: "Hey, wait. Don't leave the game. Hey...what are you doing with that baseball bat?"