Love multileaders and never use old style leaders... EVER!
I'll try to post how mine are set up, I use a user defined block for a finish callout and a multiline attribute for clarification under it. With a field in the finish callout that I link to a 'room info' block I can change all the finish tags in a room or a whole job uber easy.
AND.. if I must say, they look quite pretty, I use a drop shadow so they have 'depth' on the page and my clients love how they present to their clients.