Description as simple textarea instead of editor

Hi Greg,

I just changed the type of ad description textarea. But just want to make sure, i have done it right and effective way. Does my code looks fine ?

add_filter( "adverts_form_load", "customize_adverts_add" );
function customize_adverts_add( $form ) {
  if( $form['name'] != "advert" ) {
    return $form;
  }
  foreach( $form["field"] as $key => $field ) {
    if( $field["name"] == "post_content" ) {
        $form["field"][$key]["mode"] = "plain-text";
    }
  }
  return $form;
}