Yea, it's not necessarily the best keyboard for gaming. I do do some pc gaming, but I don't do it often, otherwise I would buy a second keyboard specifically for gaming. it definitely works, but with the bulge in the middle of the keyboard, it can take a while to get used to.
The keyboard is as responsive as any other keyboard I've used; however, my keyboard doesn't always register when I press the button "U" sometimes, but that's probably more of a problem with my keyboard than anything else.