So I'm feeling pretty good about my skills on Hard difficulty and am trying to 5 star everything.  I noticed that my scores for all mixes with the guitar accompaniment are lower on average - I feel like I do as well on them, but getting 5 stars is harder.  It surely is because you don't have the option to rewind (which is how to get the highest scores, as the game reminds us).  The solution is probably just to get better, but why not pick the brains of my favorite online gaming community?

I'm just wrapping up those guitar songs, they are longer and more obnoxious in my opinion. Just play em like guitar hero, Make sure you hit the Euphoria sequences and use Euphoria during the part of the song with the most note traffic.