Useful Drupal Commerce line item wrapper methods & properties

commerce.php

<?php
$wrapper = entity_metadata_wrapper('commerce_order', $order);

// if(isset($wrapper->commerce_customer_shipping->commerce_customer_address)){
$commerce_order_total->currency_code->value();

// order total object
$order_total = $order_wrapper->commerce_order_total->value();

// subtotal without vat
$total_ex_vat = commerce_price_component_total($order_total , 'base_price');

// total tax (in this case vat 20%)
$total_vat = commerce_price_component_total($order_total , 'tax|vat_20');

// subtotal with vat
$sub_total = $total_ex_vat['amount'] + $total_vat['amount'];

// formatted price string with currency sign
$sub_total = commerce_currency_format($sub_total, $currency_code);


/**
* LINE ITEM WRAPPER
*/

$line_item_wrapper = entity_metadata_wrapper('commerce_line_item', $line_item);

// get all line item wrappers from order wrapper
foreach ($order_wrapper->commerce_line_items as $line_item_wrapper) {
  // line item type
  $line_item_type = $line_item_wrapper->type->value();

  // for product line items:
  if ($line_item_type == 'product') {

    // line item title
    $line_item_title = $line_item_wrapper->commerce_product->title->value();

    // line item unit price
     $line_item_unit_price = $line_item_wrapper->commerce_unit_price->amount->value();

    // line item formatted unit price
    $line_item_unit_price = commerce_currency_format($line_item_unit_price, $currency_code);

    // line item quantity
    $line_item_quantity = (float)$line_item_wrapper->quantity->value();

    // line item total price
    $line_item_total_price = $line_item_wrapper->commerce_total->amount->value();

    // line item formatted total price
    $line_iten_total_price = commerce_currency_format($line_item_total_price, $currency_code);

    // get product field data (for example field_product_image)
    $line_item_wrapper->commerce_product->field_product_image->value();

    } else {
      // for shipping & discount line items

      // shipping/discount price
      $line_item_price = $line_item_wrapper->commerce_unit_price->amount->value();

      // shipping/discount formatted price
      $line_item_price = commerce_currency_format($line_item_price, $currency_code);

      // line item TYPE display title
      $line_ite_type_title = commerce_line_item_type_get_name($line_item_wrapper->type->value());

      // for shipping line items
      if ($line_item_wrapper->type->value() == "shipping") {

      // shipping data
      $shipping_data = $line_item_wrapper->value()->data;

      // shipping method display title
      $line_item_title = $shipping_data['shipping_service']['title'];

    }

    if ($line_item_wrapper->type->value() == 'commerce_discount') {
    // for discount line items

    // get discount display title (I suspect there might be a better way than this)
    $discount_data = $line_item_wrapper->commerce_unit_price->data->value();

    foreach ($discount_data['components'] as $key => $component) {
      if (!empty($component['price']['data']['discount_component_title'])) {
        $line_item_title = $component['price']['data']['discount_component_title'];
      }
    }
  }
}

@St0iK
Nice! :-)

You just have everything I was looking for, Thanks