When you listen to them you can hear the influence of Zeppelin, Creedence, the Stones, the Beatles, the Doors, Joplin, and dozens of others; but their music is 100% original.
The individual musicians are fantastic, and the lead singer has incredible range and voice control.
If these guys had been around during the late 60's early 70's they'd be rock gods. They fell out of a freaking time machine.