Cart2Cart Store Migration App

I used this app to migration my Magento 1 store over to Shopify. I was really impressed by the way the categories, customer, CMS pages and products came over seamlessly. It would be helpful if the options were explained a little better or highlighted in the initial migration set-up process. I was not aware that the subcategory migration was encompassed in an option that needed to be added on to the initial migration.