It's a great folk metal album, in the same vein as the last two, though Floor is a major improvement vocally (or should have been).
I agree Floor held back/was held back vocally. She's capable of pretty mind blowing operatic quality when she wants to be.
Clearly Tuomas meant for this album to stay in the mold of the last two. I think that could have been accomplished and we could have had more powerful vocals.
The opening track could actually be Anette singing, that's how much Floor is held back.
Still, after the initial spins, later on down the road, I'll listen to Century Child, Once or End Of An Era more often than I'll listen to any of the three post Tarja albums.