ive own a six button for like 9 years now, only use it and no other... never ran into a problem, and i own ms. pac-man, decapattack,sub-terrania... the only problem i had was that i bought another one about a year ago for the 2 player, and it fits really tight into my geeny 1. i wont dare use it on the contoller 1 port in fear its gonna break my pins. (ive had this genny 1 since my 8th bday 13 years ago, i have had to fix it to many times.)