Instruct: Classify the given review into positive or negative sentiment.
Query: If you use the "a, b, x or y" buttons this contorller stinks

I just purchased two of these controllers and unfortunately the games I play use the "a,b,x,y" buttons quite frequently. Unless you really press the buttons down hard, the functionality of the button won't work. When you push the button with normal pressure, the green light goes on in the part you plug directly into the XBox, so it is not a wireless issue, but again, no functionality. Both controllers have same problem.At Logitech Support website, I noticed in their forum section that there are quite a few people who have complained about this problem so I don't think I just received two bad controllers.