Yeah, it's really strange. You either like one or the other. I don't mind the GH guitar, but it hurts to play for a long time and the clacking can get a bit distracting.
I'm wondering if I should even bother though, since I'm going to buy the Pro Guitar... I don't think I'll ever play drums, but I almost want to have a drum set to replace my old RB1 drumset that is "upgrade ready" in case I ever want to do Pro Drums.
The only reason I'm worried is that it looks like this whole scheme of plastic instruments is basically dead - especially since Warriors of Rock bombed. It might actually be hard to buy these things down the line outside of special order.