I couldn't believe how natural these guys were behaving until I realized they're an actual band and just being themselves. The shows semi-scripted nature let's them ad lib alot. But not just them as the cast is filled with real life comedians and rockstars. The one-liners and gags are sparse. It's the situations that they find themselves that gives the show its comedy. I would liken it to Curb Your Enthusiasm. Pay attention to the three guys when they're clowning around at the studio or in the van.
Love this show. The humor is pretty dry but those are the best moments.
If you like shows like Always Sunny in Philadelphia or Flight of the Concords, you will love this show.
I can't reccomend it enough.