Multiple select form with checkboxes

Out of curiosity does anyone use the multi_select input? I’ve seen it in the phoenix docs and on wc3 but nowhere else.

Is there something you’re supposed to do with it on the front end to make it look like a checkbox group or does it always look like a bugged out select?

Btw, I managed to make something like a checkbox group with the phoenix.form and some js but I doubt its best practice.