Features of Magento Checkout Cart:
-Module is easy to customize with separated layout form and CSS
-Manage Cross Sell Products in Ajax Cart
-Manage Discount Coupon in Easy Ajax Cart
-Customer can add, remove and update without any reload of cart page
-Allows customers to change quantity with just one click
-Add to cart pop up is applicable for sidebars, my orders, product compare page etc
-Manage Shipping & Tax in Ajax Cart