Good...but not great.
This is the first Doctor Who soundtrack I'd give anything less than the full five star rating, and I guess if this was a stand-alone film soundtrack it would acquit itself. But instead, it's the latest in a long line of soundtracks that have been filled with sheer brilliance, and this one doesn't quite live up to the standards.
So there are some great tracks, as usual; pretty much anything involving River, along with heart-wrenching pieces such as 'Loving Isn't Knowing' and the adrenaline-laced 'The Curse of the Black Spot'. I particularly liked a few of the lighter pieces, such as 'Stormageddon, Dark Lord of All', amongst others. Murray Gold has certainly lived up to his usual standard of creating music perfect for any given situation.
Probably the most annoying thing is the multitude of tiny, 45 second-tracks scattered throughout that offer pretty much nothing in terms of listening value, but the real problem stems from the simple lack of tracks you'd want to sit down and listen to. Sure, scratchy violins and perpetually looped crescendos work great in an episode ('The God Complex' has a sizable collection of creepy, warbly tracks that are all exactly the same thing), but what set previous Doctor Who soundtracks apart were the pieces of music that were so packed full of melody and emotion that you were transported into the episode just by listening (series four's 'The Greatest Story Never Told' is a perfect example- oh hey, a track involving River!). Even 'The Wedding of River Song', easily the best piece on the soundtrack, still doesn't quite hit the soaring heights of its predecessors.
That said, there's still three stars worth of good stuff here, and you definitely get your money's worth of Murray Gold orchestral-goodness. I just felt that there was a much rockier transition this time from show to soundtrack.