Matrix with iCheck

Source code: Survey setup
Survey.defaultBootstrapCss.navigationButton = "btn btn-primary";
Survey.Survey.cssType = "bootstrap";
var survey = new Survey.Model({ questions: [
{ type: "matrix", name: "Quality", title: "Please indicate if you agree or disagree with the following statements",
   columns: [{ value: 1, text: "Strongly Disagree" }, 
              { value: 2, text: "Disagree" }, 
              { value: 3, text: "Neutral" }, 
              { value: 4, text: "Agree" }, 
              { value: 5, text: "Strongly Agree" }],
    rows: [{ value: "affordable", text: "Product is affordable" }, 
           { value: "does what it claims", text: "Product does what it claims" },
           { value: "better then others", text: "Product is better than other products on the market" }, 
           { value: "easy to use", text: "Product is easy to use" }]}
]});
survey.data = {"Quality":{
  "does what it claims" : "2",
  "better then others" : "1"
}}


var widget = {
    name: "icheck",
    isDefaultRender: true,
    isFit : function(question) { return question.getType() === 'matrix'; },
    afterRender: function(question, el) {
        $(el).find('input').data({"iCheck": undefined});
        $(el).find('input').iCheck({
          checkboxClass: 'iradio_square-blue',
          radioClass: 'iradio_square-blue'
        });
        $(el).find('input').on('ifChecked', function(event) {
          question.generatedVisibleRows.forEach(function(row, index, rows) {
            if (row.fullName === event.target.name) {
              row.value = event.target.value
            }
          });
        });
        var select = function() {
          question.generatedVisibleRows.forEach(function(row, index, rows) {
            if (row.value) {
              $(el).find("input[name='" + row.fullName  + "'][value=" + row.value + "]").iCheck('check');
            }
          });
        }
        question.valueChangedCallback = select;
        select();
    }
}
Survey.CustomWidgetCollection.Instance.addCustomWidget(widget);