i don't have any experience with these buttons, but if i had to guess, i'd say they would probably be too stiff to use for controls. they may work OK for admin type functions, but i just can't imagine that they would be usable as gameplay buttons.
are you planning on building a mame cabinet? or modifying an existing cabinet? if so, assuming that there are no arcade shops in your country, what are you going to use for joysticks? how about a control interface? my point is, you are probably going to have to order other parts also, which may mean you have to order from outside your country.