i ussually fail at 89%ish because i have a ghetto guitar, i got the 360 version and the fret bottons go out, i found a great way to fix it... DUCT TAPE, and sad part is that it fixed it (now only the red botton goes out) and im sad that i cant 4 star it without no fail on >_< 352k is my highest score with no fail off XD and i cant remember what my percentage is when i finish it, i think about 85% i got once
also i dont tap the beggining, i stretch my fingers, (2 weeks of practice XD) and its easy to beat the beggining, (if ur having trouble) use a rubber band around the green botton and strumm on the other notes ^_^, also if u cant beat the beggining, good luck on the solos XD
(>'-')>|<('-'<)