What are the stats that it can capture? What kind of a report does it give?

You can get a report for each mini-course and you can see which cards have been completed / replied in a single excel spreadsheet. If you have asked an assessment question, you'll see true/false; if you have asked a survey question, you'll see which options were selected, if you have asked star-rating question (1-5 scale), you'll see the numeric value; if you have asked free-text question, you'll see the user's reply with their own text.