I'm just gonna say this really quick cause I might be busy for the next hour or so, if we're voting for buttons or no buttons: I vote no buttons. That always irritated me in the show. Internally when I saw them press the buttons, It sent unecessary shivers down my spine.

 It felt like the biggest waste of time. Besides we're more advance now, shouldn't finger recognition, touch pad, or some genetic code be better. Lol to be extreme, wouldn't blood print be messy.