It needs SPDT switch, and that rules out most of buttons.
And if you do end up choosing SPDT switch, then there are much simpler designs which have switch toggle between Vcc and GND, like Don Lancaster's debouncer [0]. That design is especially useful if you have many switches, as you can wire all VCCs and GNDs in parallel, and use 8-channel buffers to debounce multiple ones.
The SR latch schematics only makes sense if you are working with TTL logic (popular in 1970/1980) which did not nave a symmetric drive output pattern, and there is absolutely no reason to use it in 2000's.
