Alrighty here i be.
Your intro takes a little to long to come into play in my opinion. I also feel its a little to bassey (just how i feel though) its got a really cool element to it though i must say. Very ambient in the beginning. The song itself does transform and change flow wich is pretty nice making it not really all that repetitive and keeps me listening dispite how long it is. The lenght I Do feel is a huge issue to this song being 15 minutes is ehem...kinda long and most people WILL lose interest. So thats something you may want to work with on this for sure. However the song itself sounds as if it could be several songs compressed into one. Perhaps thats what you should do. Make it aproject on making this several seperate songs. =). Anyway just my opinion. All in all its a good listen just way to long.
Wyldfyre1