I downloaded this scenario,and, while it definetly does what it set out to do- create the most accurate modern-day scenario ever- playability and fun suffers greatly from the lack of units at the start (not enough defensive units to defend all my cities), and from the huge building times. Both these aspects of the scenario are realistic, but greatly discourage war, which, as in any scenario with this many civs, breaks out in the first few turns even without the player starting it. The modern day can't realistically be represented by Civ3. The AI can't grasp the political situation (although the USA often goes to war with Iran early in the game), so many unrealistic alliances and wars occur.
Don't get me wrong- this scenario has great potential! The loading times are astounding for the scenario's size, and I love the new units, leaderheads, and licence trading. These are all very unique to this scenario, and are part of the reason I believe it can be great. Obviously, a LOT of time went into making it. I think a few changes due to the limitations of the AI is all it requires to be one of, if not the, best scenaios ever.