I got some Logitech wireless mouse / KB combo for Xmas like 5 years ago and that shit was AIDS! And I'm talking full on, lesions and anorexic looking HIV riddled AIDS, not Magic Johnson, "gee you can't even tell that this guy has" AIDS. I tried to CS with it once, unplugged it, gave it to my mom and never used it again.
I'm hoping the technology has improved since then, but that experience soured me on the wireless mouse / kb experience. The only reason I bought the Dynex is because the shit cost $20. At that price, even if the shit IS AIDS, it's worth it for the 3 free batteries it comes with. :S All in all, I am fairly impressed given what I paid for it. The keyboard can't keep up with my hyper-typing but most can't.