I've already tore apart the hPC score and plan on assembling a quartet/chamber group to play it (along with other music) with... ahhhhhh what I would do if I had a copy.... please someone buy this for me. (;c)
I would highly recommend doing it. If you can read music, it's more fun than you could ever imagine to follow along in the score while listening, it makes you pick up so much more. If you're a theory nerd, you can actually do analysis or look at trouble spots ("So...Mt. Alpentine is in B major, but the vocal line is written in Bb major?" "I guess Owen really reads The Great Elsewhere in 4/4 from start to finish" "So that's the string motif in Tryst, and the performers are supposed to 'play with it, no two players the same'"). If you're an arranger or looking to perform, this is your bible.
On my list of most valued possessions, this is seriously up there for all those reasons.
Watch out! It seems as though it is about to rush into the darkness where you are sitting and reduce you to a mangled sack of skin, full of crumpled flesh and splintered bones, and destroy this hall and this building, so full of wine, women, music and vice, and transform it into fragments and into dust. But this, too, is merely a train of shadows.