It's.... alright. I've had this for years, and I remember really liking it back when I first got it. I still kind of like it, but as others have said, timing is strange. It almost seems like a rush to play certain songs. I do miss the alternate instruments they used to have though, as well as the mechanic for earning coins based on song completion. As nice as this app is, I will eventually hit a wall with song unlocks. The offers don't work for me, and I will eventually run out of achievements.