I feel as if this game should have been around 25 hours long, and I would have been quite satisfied if that were the case. However zelda always had filler, the main difference here and the reason why I think we've seen many people (including myself) complain about filler is the fact that Skyward Sword takes very little effort to disguise it, doesn't make the player feel purpose in going through it and becomes a grind because of it.
Due to the filler, this game becomes boring with spikes of brilliance. The Dungeons are very well designed and might be my favourite of the 3-d Zeldas, the motion controls are very responsive and might be the only game aside from Zack and wiki where the use of the motion controlls genuinely enhances the gameplay. The boss fights are as exhilarating as they've ever been because of both the use of wii motion plus and treating the boss fights as straight up fights instead of showpieces for your newest item. The puzzles are also a refreshing departure from what we're used to.
While the motion controls were excellent as a zelda game I was left disappointed. It didn't live up to the level of quality gameplay I expect from zelda, However when compared to regular games it was still quite good.