Like the riff, love the solo, and Gabe sounds badass as always. Hearing a lot of late 80's/early 90's Soundgarden in there. Studio version should be rockin as well....your son and his buddies are doing the right thing.
I can hit E2....no idea how people get into the first octave without using fry. I am jealous so I will just say that it's some kind of subtle fry that they're using, bunch of cheaters.