Wow, they are really good.
That surprised me, I didn't expect them to be that good. It reminds me of stuff I listened to as a kid. Does your son use any distortion at all? I like that sound. I used to just play heavy metal, but recently I've been doing lighter stuff.
They've got something going there, with the brotherly (and sisterly) love and such. I wish my band were like that, all they do is argue.