While the bass is a little bit on the easy side, the lead guitar, drums, and of course, singing are all the perfect level of challenging to make it fun. I'm already a HUGE fan of the song so playing it on Rock Band was a real treat. I can't imagine a single person with the game not wanting to pick this up when it hits the consoles.
I was a little bummed to discover that while the original singing is there and can be cranked up enough to cover your truly awful singing voice, there is no modulation for your voice while you are singing. So you can harmonize with a computer, but you can't sound like one... and we all know how awful that is.