There's no easy way to say this, but this song has one of the worst guitar charts ever released for Rock Band. Obviously that is very arguable as there have been some really bad ones before.
Remember "Lucky Denver Mint"? Remember how that song's guitar chart was incredibly annoying? Remember how that song consisted of nothing but constantly strumming various chords? Yeah, well this is worse.
How so? Well for starters, this song is actually more repetitive. At least with LDM there were a lot of chord changes; they were still annoying, but at least you would be changing your finger positions. This track has three notes. Yeah, three notes. Those notes are red, yellow, and orange. You will be holding one of those colors (changing colors on occasion) for the entirety of the song!
There are brief instances throughout the song where you will actually play chords, but this only occur two or three times and only last a second or two. Then it's right back into the constantly strumming notes.
How Harmonix deemed this song worthy of a Pro guitar chart is beyond me. It truly shows that Harmonix plans only to abuse the Pro guitar for the money, and not as an actual educational tool as they suggested months ago (after all, any other song this week would have been more educational than this on Pro guitar).
Would I recommend buying the song for guitar? Hell no! It's a horrible guitar song! I can't speak for the other instruments, but if you play guitar, you should avoid this like the plague. And what about the Pro chart? Well, if you really want to learn this song's guitar, then I would recommend watching a Youtube video of it. Let's face it, you're only going to be learning three frigging notes anyways, so why waste the dollar?