If you own Opus Atlantica and like it, it's a decent bet. If you don't own Opus Atlantica, get it before you get any Midnight Sun CDs. Same singer, similar sound, but a little better songs.
It's almost like a joke cd, but it IS quite strong in terms of melody. The themes are cheesy and it's a very different release when compared to the bands other titles. I like it, but it's a guilty, guilty pleasure.