If you've played BlockBand, you might have come across this problem. A delay between the music and when you have to press the keys in time with it. For some people, its not a big deal, but i like to listen to the music AND press the buttons in time with it... If i notice it, i just wait a split second before well, pressing the key. Although when it happens suddenly its a problem. You have a great streak going and all of a sudden BAM you are back to the lowest streak. Once there is a sudden delay, i find it extremely hard to press the keys a bit after. The game is great, but this ruins it (at least for me, and maybe quite a few others). If it could be fixed somehow it would make it waaay better. Also, just before you ask, nope, not getting any server lag or computer lag.