I finished the game a few days ago. And Let me tell you.. ITS AMAZING!! I love its dark theme and everything!!!
The boss fights are quite easy btw. The things I personally found hard was (SPOILERS) The return to Kakariko Village, Zant's Hand and the Horseback riding for the 3rd phase of Ganondorf's battle. Everything else is alright.
Also if you have extreme arachnophobia, I advise you to stay away from this game because It will NOT be fun for you...