It is awesome
What really turned me on to this was that it was of course a remixing of One Winged Angel, one of the most popular video game songs ever made. The only thing I did not like was that it did seem a bit muddled. It's still very hard to create anything bad out of a song as awesome as this. It's a little hard to tell what it is a remix of at first. What really works is that you put in a good sense of creativity by modifying another song. The tune still has a good amount of originality to it.
I am glad you are acknowledging all the people who helped with every single instrument on this. There's just so much going on at one time! I'd have to say the best part is the most famous part of the song where they say, "Sephiroth!". I believe that's what they say, right? It kind of gives you the feeling of traveling into a deep, mad world.