Render Image from REST API Call

Here's the var from the function:

var aoTiles = "<div class='col-md-4 tile'><div class='tileImg' style='background: url(" + [value=this.Image_x0020_Thumbnail_.Url] + ") no-repeat 0 0;'><span class='openRotator'></span></div><div class='tileTitle'>" + this.Title + "</div><div class='tilePrice'>" + this.Product_x0020_Price.toFixed(2) + "</div></div>";

Instead of rendering the image, I get nothing.

If I do something simple like this:

var aoTiles = "<div class='col-md-4 tile'><div class='tileImg'>" + this.Image_x0020_Thumbnail_.Url + "</div><div class='tileTitle'>" + this.Title + "</div><div class='tilePrice'>" + this.Product_x0020_Price.toFixed(2) + "</div></div>";

If you need the full function:

function addOnsTiles(){
    $.ajax({
        async: false,
        url: "/_api/lists/getByTitle('Products')/items",
        type: "GET",
        headers: { "Content-Type": "application/json;odata=verbose", "Accept": "application/json;odata=verbose" },
        success: function (data) {  
            $.each(data.d.results, function () {
                var aoTiles = "<div class='col-md-4 tile'><div class='tileImg'>" + this.Image_x0020_Thumbnail_.Url + "</div><div class='tileTitle'>" + this.Title + "</div><div class='tilePrice'>" + this.Product_x0020_Price.toFixed(2) + "</div></div>";
                $('.aoTilesTopWrapper').append(aoTiles);
            });
        },
        error: function (data) {
            alert(data.statusText);
        }
    });

return true;
}

It gives me the image URL but still no image.

Why is it not rendering?