The export to xls-feature in the feedback module makes the module a powerfull tool for processing the data outside Moodle in many ways.
A typical use case is to export the detailed tab to CSV and import that in a database for further analysis.
At the moment the question multiple choice - multi answer is posing a problem, since the multiple answers are line separated stored in one cell.
One possibility to solve this problem is to change the way it is stored by adding a column per possible answer as with question+option as header and a 1 or 0 if checked or not. May be there are better ways