man, i gots a logitech cordless mouseman (ergoish) and everyone complains about bad gaming (q3,cs,ut) experiences, and i think they just suck. it works fine. they all do. i doubt 5ms in time will change outcome. if you shot him, hell be dead. if you thought you did, and missed, then chances are, you missed. hehe. although it does suck when you are about to nail the flag carrier and batteries die...arg!