If, like me, you have heard Sigur Ros' more recent output and like it but haven't heard this side of them yet, then this album will blow you away. I thought their last album (which I can't type out as Icelandic characters aren't accepted in reviews) was good but now I have gone back to earlier in their catalogue I have changed my perspective on their music completely.
Unlike their more recent records, this is really a post-rock album, dark and melodic. The piano based songs such as tracks 1 and 3 are truly beautiful while the heavy epics such as tracks 7 and 8 are huge, monstrous and moving.
If you were a Sigur Ros fan already before this album or are just interested in what they're all about, then I cannot recommend "( )" enough.