Not bad. Wish the camera wasn't so far away. 

The one playing Duane's parts is singing Gregg's. 

Good Les Paul tones. SIDE guitar good. 

If I were there I'd yell PLAY ALL NIGHT & WHIPPING POST !!!!!!! 

I saw this band a couple days after this video was taken. First time seeing them. They were quite good. I'd definitely see them again. I think the lead player next to the keyboards nailed the guitar parts & sang Gregg's songs well.

One thing I've noticed with some ABB trib bands is that either the vocalists aren't too good or some try too hard to emulate Gregg's vocals. So - this guy just sings naturally and did good justice to Gregg.