Zelda: Skyward Sword's main quest takes roughly 35 hours to complete, according to Official Nintendo Magazine's world-first review of the game.
However, playtime "at least" doubles that if you opt to complete "the game's plentiful side-quests, collecting all of the insects, upgrading all of the items, discovering the locations of the Goddess Cubes and exploring the world".
ONM awarded the title a stellar 98% score, the mag's joint highest ever. The verdict, which appears in the just released December issue of Official Nintendo Magazine, claims the first built-for-Wii Zelda is the "best Zelda game ever made".
For the full review buy Official Nintendo Magazine online and have it delivered to your door.