This is one of VERY few songs approaching 20 minutes where I didn't get bored at ALL at some point in time. My mind is fucking blown right now. Just WOW.
And the epic Drum fill/mini solo starting at around 6:30 is some of the best Drumming I've ever heard.
I'm not a huge fan of BTBAM either, but I just heard this today, and it's my current favorite song already.