I've been loving the game. Just finished the worm-world. Yes, the structure borrows heavily from Zelda. But I think it improves on it exponentially by not having a boring first 5 hours. I think having a new compelling story and full voice-acting is a huge jump over all of the latest Zelda games with repetitive stories and text-only approach.
Also, the combat is way way way way way way better than Zelda.
If anything I'd say it feels like God of War with a exploratory Zelda structure. I'm 7 or 8 hours in and I have a ton of cool stuff and my combat moves are awesome. If I was 7 or 8 hours into Zelda, I'd be lucky if I could afford a bomb bag at this point.
I would say flat out that the game is more enjoyable than Twilight Princess, but I have never been a huge fan of the Zelda games - as you may have noticed, I think they are paced far too slowly.
