Summary: Unlike 'Ace Combat 4', the graphics for the story-line was Very-Good! The Arial Graphics were Good/Very Good! The Challenges in each Stages, were well planned and worth-well playing! The Fighter Designs/Lay-outs were Good, but not Great. Actually, almost better than 'Ace Combat 4', almost! The Best Graphics I have seen so far is 'Ace Combat 5'! 'Lethal Skies II', comes close.
Summary: Leathal Skies II may not beat to Ace Combat 4 (Its only real competition) on the graphics front, but it has it in every other aspect. I own both games, and got bored of Ace Combat 4 within two hours. I'm still playing Leathal Skies. This game has very realistic flight patterns, and you just can't do anything that's physically impossible. Your payload (missles, et cetera) is also realistic.
Summary: One fun game. One challenging game. Try this one with the hardest setting and see how long it takes to finish the missions!! It may not compare to the Ace Combat series visually, but it has a lot to offer! Highly Recommended!