Same problem here – after debugging the plugin so that I could actually have essay questions that would not jump to the end of the quiz as soon as the first one was answered (line 144 of models/question.php needs the SQL call to read $answer = $wpdb->get_var($wpdb->prepare("SELECT id FROM ".CHAINED_CHOICES ." WHERE question_id=%d", $question->id));
instead of $answer = $wpdb->get_var($wpdb->prepare("SELECT id FROM ".CHAINED_CHOICES ."WHERE question_id=%d AND choice LIKE %s", $question->id, $answer));
otherwise it searches for a choice equalling whatever the user typed. NB This fix requires the user to name their text box otherwise is returns NULL as nameless textboxes do not feature in the chained_choices table), now when I check my survey results, I find that all my text input has become 0.00 when I look at it from View Submissions-> View details
From checking the chained_user_answers table, I can see that the data is being recorded for the text based questions, just not displayed in the View Submissions -> View Details page.
For all other question types, it seems to work fine.
If possible, I might also suggest a toggle to hide images for the View Details page – if you include big images in your questions, it makes it very hard to read the results.