A quick note to warn anyone that is planning to use the Salesforce Marketing Cloud and the affect on your data storage costs.

If you are setting up Marketing cloud watch out the affect it can have on data storage costs if you use Marketing Cloud connect. Marketing Cloud connect allows you to use data from Sales and Service cloud, however it also can store huge amounts of data on the Sales and Service cloud when you run your campaigns. You should look at configuring the Marketing cloud to only store aggregated email data in the Sales and Service cloud otherwise you may cause the customer to hit their data limits.