Ok I just finished Zelda TWW today and I started playing OOT for the first time. I can see why the reviews have stated that they took OOT and improved every facet and that became TWW.
The music, control system (especially the user controllable camera. dear lord I appreciate it even more after playing OOT), and the art direction for TWW definitely are perfect for this game. I don't think it would have been as good of a game in terms of artistic direction if it had been "realistic" like the Spaceworld 2000 demo.
People probably would have just said "Oh, it's just OOT with prettier graphics and a slightly tweaked interface," which would have not done justice to the game.
After finishing it, I can agree completely. TWW is perfect the way it is. Well, almost. I wish there were more things to do with your money. 5000 rupees is a lot of cash and there's not much to buy in the game that you can't get from myriad enemies, or just cutting the lawn. Also, the enemies could have taken a little more damage off to make the game just a tad more difficult, but even there I can understand as the game designers wanted to place more emphasis on the puzzles rather than the battles with the individual enemies.
Either way, this game is a masterpiece. For my first Zelda experience since the original on the NES (which I also loved and completed both quests), I can say that I am quite pleased to have delved back in. Now on to Metroid, Eternal Darkness, Mario Sunshine, and a host of other games that I haven't had a chance to play yet.
p.s.: I think I completed every side quest in the game before actually completing the game, which most certainly enriched my experience, as well as the story itself. I played the game roughly 3-5 hours a day, every day, for the past month. So I can safely say that my total time was roughly 80-100 hours. Definitely got my money's worth.