I've only recently discovered Poly-Math, but they have immediately rocketed to my top 5 favorite instrumental rock/metal outfits of all time. Simply put, their music is incredible. Melodic, heavy, epic, vast, immersive, and full of killer hooks that will grab you and not let go. This album in particular is a masterwork, but you can't go wrong with any of their releases. I highly recommend this group to any fans of the genre.