Once you get into being able to play it, yes. I love the patterns at the start, and I definitely see myself improving a bit, despite having not played in months, lol. I need to get my right thumb into play, and (drastically) improve my scratching, lol. Anything with more than 1 or 2 scratches in a row owns me.
Also, I wish I could pass Genome Screams [h], those patterns kick my ass :/
Also, why did they have to make Era [h]'s ending such bullshit?
And lastly: I wish I had my memory card back... it sucks not having [a] :/ Damn my brother lending out GH and the memory card....
EDIT: It was Era, not Sync...