Saw them at Coachella and they absolutely blew it up.
Such a talented band, and an amazingly huge sound for three guys (although I think on some tunes they were augmented by a keyboard/synth guy).
Visuals were amazing with perhaps the most lasers I've ever seen.
They also threw in Star Spangled Banner, Nirvana, Jimi Hendrix and Rage Against the Machine jams in between songs, go see them if you can!