I was really impressed with Neverworld's End, but like many others, thought they might spoil a brilliant sound with the change of singer. The replacement vocalist, Dianne van Giersbergen, is brilliant, she matches the music style and has a great range.
Sacrificium is another wonderful album and it still sounds like it was done by Nightwish at their best. They can really write good music and the production is very well done. Personally, I think the title track is a bit long at 10 minutes and it doesn't quite do it for me. but there are no weak songs, it's a great CD. The songs Nightfall and The Undiscovered Land really stand out, and the more you listen to it, the more you hear stuff that you really like. It's got depth, it's a bit less commercial than the previous CD, well worth having.