This is great music! After listening a few times, I think this is great. I usually listen a few times before a Philip Glass song makes sense, and then I can get the idea. A lot of his music seems like it should be for a movie, and a lot is. With music that isn't from a soundtrack like this music here, I end up picturing my own movie for the music. This recording of the didgeridoo with organ would definitely be good soundtrack music to a suspense film. The didgeridoo sounds amazing in these songs, haunting and epic.
As for the other part of this recording, the solo organ music is good, however I've already heard these songs many times since these are simply organ renditions of preexisting songs like Islands and the other film songs. New Cities sounds the freshest on organ, and I did not recognize it at first. Overall, Michael Riesman is the best Glass player, probably better than Philip Glass even.