| Do | Keep the list short: three to seven options is the sweet spot. Beyond that, switch to MultiSelector which adds search and scrolling. |
| Do | Turn on dividers (hasDividers) when items have helper text underneath; without them the labels and descriptions blur together. |
| Do | Write a group label that says what the choices represent: "Export formats" tells users more than "Options". |
| Don't | Show a CheckboxList when the user can only pick one thing; that is what RadioList is for. |
| Don't | Put buttons or links inside the trailing slot (endContent); the whole row is already tappable, so a nested button creates two competing click targets. |