This.
No vocalist, it's an instrumental.
Basically, for drums, bass, keys and guitar it's very tricky and complicated song to play.
As a bassist I can play this song fairly well, because I regularly practice it.
I'd love to play with a drummer, keyboardist and guitarist that could also play it.
It's such a fun song with some really interesting sections, a few solos here and there and it's challenging as well which bears it's own reward.
Also, playing anything that looks challenging on stage usually wows a few people. It's silly, I know, but I love playing gigs and coming off stage to "Dude, that bass solo looked hard as fuck and it sounded awesome".