Building "Communications preference center"

Hi all,

Is anyone using Communications preference center and could advise on the best practices building it?

Can you also please educate me how it interacts with Marketo, in terms of how people can unsubscribe, choose email frequency and how it reflects in Marketo? Would we have to build customized settings? For example if a person chooses to receive emails once a week and get communication only about the particular product, do we have to customize /re-build email limitations cap settings?

Much appreciate the help,

Diana