"Courtyard Apocalypse" is nothing short of brilliant. It invokes the tragic, seemingly helpless and dire mood of the Hogwarts battle, and when complimented by the visuals of our trio running around fighting miscellanious Death Eaters...well, it makes my skin chill. Amazingness.
"Showdown" isn't nearly as OMG THIS IS SO AWESOME!!!, but the last two minutes as Harry and Voldemort fight and then fly over Hogwarts castle is pretty brilliant. Nicely solidifies the intimate nature of the Tom Riddle/Harry Potter punch and slapfest, but also makes not of the epic good versus not-good overtone of the whole affair.
Not the best soundtrack of the franchise, but Desplat did great. I still wonder what John Williams would have done with this final piece. And if anyone is painstakingly waiting for a DEATHLY HALLOWS PART 2 review, I'm holding off until the DVD/Blu-Ray release. That flick deserves to be dissected and given proper time to compose a thorough, critical, yet loving review. So until then, continue to contribute to its billion dollar grossingness. Or send that money my way to help pay for tuition. Either is great. Enjoy!