After a lot of thinking, I finally caved and bought this song, mainly due to the rave reviews for bass and vocals. And those deserve all the praise they get.
I had an inkling of what I was getting into with the guitar, however. Ska and a tier 5? This isn't gonna be fun.
Well, it wasn't. But it was not as bad as I thought it would be, because the song is mostly just slow enough for a normal human being to play without tying knots into your fret hand, counterintuitive ska rhythms notwithstanding. Surprisingly enough, the really annoying part is the chorus. Think "Ramblin' Man"'s verses, with the added difficulty of chord/single note switches.
For someone like me, whose gold standard of "fun" in this game is defined by guitar tracks like "China Cat Sunflower", this simply isn't fun at all, and I can't imagine who would find it to be such. It's difficult, but there's really no skill involved other than moving your second finger against a standard rhythm. But I've definitely seen worse ska guitar parts in this game - "Come On Eileen" has enough variety to keep your interest, at least.
Verdict: Unless you play exclusively and only guitar, get this one. The bass, drums and vocals are amazing, and the keyboard (horns) aren't that bad either, just a little empty. Guitar warrants no more than 2 stars, though - most definitely the weakest link of this song.