What already is not that great - the latency - clearly you have the always - but I used GarageBand on Mac and the like and have a significantly shorter latency as in this game, (ie one strikes the string and hear the sound only shortly later) , But well I can live with.
With what I can not live grad - my Win7 64-bit computers every minute gets out of the game and goes back to the desktop. Then I must be pure click again - can indeed make the place more where I was but so you can not play, yes. So I guess that's up to my computer and not on the software - therefore no rating trigger.
Yesterday I played 3 hours at a time and have to say - the implementation is even more brilliant as I thought.
My friend also tried hats and fands super - even if it as a total beginner is for them a lot - but could after they play a few well-known riffs (simple) has it they even packed and I had her immediately create a profile.
So the game is just awesome just in combination with their own guitar.
If it would now run more stable.
A star deduction for latency!