Does Qcarbo32 work?!?

i have my test tomorrow anytime i want from 2-5pm and i bought qcarbo for this test bc ive heard good things. Also i took one today and have that in my system (long story lol) so if having 2 in my system helps my odds? idk i just want some feedback from people out there that might know something about it. Also any helpful advice on how to take it would be great!!! thanks