Conversation so far:
Is Sonata Arctica's Unia and The Days of Grays a musical band?
Unia, is the fifth full-length studio album by the power metal band Sonata Arctica. The Days of Grays is the sixth full-length studio album.

Question: Was the album a hit?
Self-contained rewrite: Wsa the Sonata Arctica album, Unia a hit?